Don’t like seeds in your tomatoes? You might be pleased to know that seedless ones have been created by gene editing.
This could create a wide range of seedless fruits, but few may ever be seen in the supermarket if regulators decide to treat gene-edited crops in the same way as genetically engineered ones.
Several seedless fruits, from bananas to grapes, are already available, but have mostly come about by luck rather than design. And although there are a few seedless varieties of tomatoes, they’ve taken researchers many years to create.
Now it can be done very quickly, as Keishi Osakabe at Tokushima University in Japan has shown. His team used the CRISPR gene editing technology to make fruits develop even though no seeds had begun to form. “We haven’t tasted them yet, but in theory they should taste the same,” says Osakabe.
There have been a few efforts to create seedless tomatoes using earlier genetic-engineering techniques. These methods take longer time compared with CRISPR.
Some “seedless” fruits just have very small seeds, and still require pollination (授粉). But completely seedless fruits like the edited tomato do not require pollination at all. Such plants could improve food security by reducing our reliance on smaller bee populations, says Saul Cunningham at the Australian National University. Many fruit growers buy bees to pollinate their crops.
There is a deficiency for farmers, however. Seedless plants usually have to be grown from cuttings, which involves more labor than planting seeds.
CRISPR could be used to develop other types of fruit that don’t require pollinator, as well as introduce beneficial mutations (突变), says Osakabe.
But to make it on to the supermarket, gene-edited plants may have to meet the same standards as genetically engineered plants, which would greatly increase costs. Some argue chat since gene editing is used to introduce mutations already found in some of the plants we eat, it should not require such strict regulations.
1.What has been the problem with tomatoes created in the past?
A.Their taste was not very good. B.They still had a few big seeds.
C.Their genes could not be recognized. D.They took quite a long time to create.
2.What did Keishi Osakabe’s team do?
A.They edited tomatoes’ genes.
B.They changed the taste of tomatoes.
C.They made seedless bananas and grapes.
D.They created genetically engineered tomatoes.
3.Why is CRISPR better than previous methods?
A.It will still require pollination.
B.It will remain unaffected without bees.
C.It will reduce people’s reliance on food security.
D.It will make many growers buy bees for pollination.
4.What does the underlined word “deficiency” in Paragraph probably mean?
A.Danger. B.Disadvantage.
C.Benefit. D.Solution.
高三英语阅读理解中等难度题
Don’t like seeds in your tomatoes? You might be pleased to know that seedless ones have been created by gene editing.
This could create a wide range of seedless fruits, but few may ever be seen in the supermarket if regulators decide to treat gene-edited crops in the same way as genetically engineered ones.
Several seedless fruits, from bananas to grapes, are already available, but have mostly come about by luck rather than design. And although there are a few seedless varieties of tomatoes, they’ve taken researchers many years to create.
Now it can be done very quickly, as Keishi Osakabe at Tokushima University in Japan has shown. His team used the CRISPR gene editing technology to make fruits develop even though no seeds had begun to form. “We haven’t tasted them yet, but in theory they should taste the same,” says Osakabe.
There have been a few efforts to create seedless tomatoes using earlier genetic-engineering techniques. These methods take longer time compared with CRISPR.
Some “seedless” fruits just have very small seeds, and still require pollination (授粉). But completely seedless fruits like the edited tomato do not require pollination at all. Such plants could improve food security by reducing our reliance on smaller bee populations, says Saul Cunningham at the Australian National University. Many fruit growers buy bees to pollinate their crops.
There is a deficiency for farmers, however. Seedless plants usually have to be grown from cuttings, which involves more labor than planting seeds.
CRISPR could be used to develop other types of fruit that don’t require pollinator, as well as introduce beneficial mutations (突变), says Osakabe.
But to make it on to the supermarket, gene-edited plants may have to meet the same standards as genetically engineered plants, which would greatly increase costs. Some argue chat since gene editing is used to introduce mutations already found in some of the plants we eat, it should not require such strict regulations.
1.What has been the problem with tomatoes created in the past?
A.Their taste was not very good. B.They still had a few big seeds.
C.Their genes could not be recognized. D.They took quite a long time to create.
2.What did Keishi Osakabe’s team do?
A.They edited tomatoes’ genes.
B.They changed the taste of tomatoes.
C.They made seedless bananas and grapes.
D.They created genetically engineered tomatoes.
3.Why is CRISPR better than previous methods?
A.It will still require pollination.
B.It will remain unaffected without bees.
C.It will reduce people’s reliance on food security.
D.It will make many growers buy bees for pollination.
4.What does the underlined word “deficiency” in Paragraph probably mean?
A.Danger. B.Disadvantage.
C.Benefit. D.Solution.
高三英语阅读理解中等难度题查看答案及解析
GET YOUR DEGREE AT HOME!
Have you ever wondered what a Degree might be worth to you in your job or career(事业)? It means a lot of Americans with an Associate Degree average nearly $10,000 more in yearly earnings than those with just a High School Diploma(毕业证).
Harcourt Learning Direct offers you a way to get a Specialized Associate Degree in 11 of today’s growing fields-without having to go to college full time. With Harcourt, you study at home, in your spare time__so you don’t have to give up your present job while you train for a better one. Choose from exciting majors like Business Management, Accounting, Dressmaking &Design, Bookkeeping, Photography, Computer Science, Engineering, and more! Your training includes everything you need! Books, lessons, learning aids__even professional-quality tools and equipment__everything you need to master your training and more ahead to a new career is included in the low tuition(学费) price you pay. Your education is nationally recognized! Nearly 2,000 American companies__including General Electric, IBM, Mobile, General Motors, Ford, and many others__have used our training for their employees. If companies like these recognize the value of our training, you can be sure that employees in your area will, too!
Earn your degree in as little as two years! Get a career diploma in just six months! The career of your dreams is closer than you think! Even if you have no experience before, you can get valuable job skills in today’s hottest fields! Step-by-step lessons make learning easy. Prepare for promotions(提升), pay raises, even start a business of your own! Send today for FREE information about Harcourt at home training!
Simply fill in your name and address on the coupon(票券) above. Then write in the name and number of the one program you’re most interested in, and mail it today. We’ll rush your free information about how you can take advantage of the opportunities(机会) in the field you’ve chosen. Act today!
Mail coupon today!
or call the number below
1-800-372-1589 Call anytime, 24 hours a day, 7 days a week.
www. harcourt-learning.com
E-mail: harcourt@learning.com
1.This advertisement aims at calling on people to ________.
A. attend full-time universities
B. work part time to further their education
C. improve their education at home to get better jobs
D. earn their degrees in different ways that suit them
2.Which of the following is NOT clearly mentioned in this advertisement?
A. The way how you will get your degree.
B. Tuition price.
C. The hot fields you will be preparing yourself for.
D. The length of time it will take you to get a degree.
3.What does the writer of this ad intend to say by naming General Electric, IBM, Ford, etc.?
A. To show that their training is widely used in the country.
B. To show that the training program is fully supported by famous companies in the U. S.
C. To prove the value of their training in every area.
D. To show the importance of getting recognized by the most famous companies.
4.It seems to the writer that the greatest attraction for people to take their training is______.
A. its convenience
B. the degree’s nation-wide recognition
C. the economic benefit it will bring about
D. the hot fields the training will help people to enter
高三英语阅读理解中等难度题查看答案及解析
C
GET YOUR DEGREE AT HOME!
Have you ever wondered what a Degree might be worth to you in your job or career? It means a lot of Americans with an Associate Degree average nearly $10,000 more in yearly earnings than those with just a High School Diploma(毕业证).
Harcourt Learning Direct offers you a way to get a Specialized Associate Degree in 11 of today’s growing fields-without having to go to college full time. With Harcourt, you study at home, in your spare time-so you don’t have to give up your present job while you train for a better one. Choose from exciting majors like Business Management, Accounting, Dressmaking &Design, Bookkeeping, Photography, Computer Science, Engineering, and more! Your training includes everything you need! Books, lessons, learning aids-even professional-quality tools and equipment-everything you need to master your training and more ahead to a new career is included in the low tuition(学费) price you pay. Your education is nationally recognized! Nearly 2, 000 American companies-including General Electric, IBM, Mobile, General Motors, Ford, and many others-have used our training for their employees. If companies like these recognize the value of our training, you can be sure that employees in your area will, too!
Earn your degree in as little as two years! Get a career diploma in just six months! The career of your dreams is closer than you think! Even if you have no experience before, you can get valuable job skills in today’s hottest fields! Step-by-step lessons make learning easy. Prepare for promotions(提升), pay raises, even start a business of your own! Send today for FREE information about Harcourt at home training!
Simply fill in your name and address on the coupon(票券) above. Then write in the name and number of the one program you’re most interested in, and mail it today. We’ll rush your free information about how you can take advantage of the opportunities in the field you’ve chosen. Act today!
Mail coupon today! Or call the number below 1-800-372-1589. Call any time, 24 hours a day, 7 days a week. www. Harcourt-learning. Com. E-mail:Harcourt@learning. com.
1.This advertisement aims at calling on people to ______.
A. attend full-time universities
B. work part time to further their education
C. improve their education at home to get better jobs
D. earn their degrees in different ways that suit them
2.What does the writer of this ad intend to say by naming General Electric, IBM, Ford, etc.?
A. To show that their training is widely used in the country.
B. To show that the training program is fully supported by famous companies in the U. S.
C. To prove the value of their training in every area.
D. To show the importance of getting recognized by the most famous companies.
3.It seems to the writer that the greatest attraction for people to take their training is_____.
A. its convenience
B. the degree’s nation-wide recognition
C. the economic benefit it will bring about
D. the hot fields the training will help people to enter
4.How many ways are mentioned in the ad for people to get in touch with the Harcourt Learning Direct?
A. One. B. Two.
C. Three. D. Four.
高三英语阅读理解中等难度题查看答案及解析
GET YOUR DEGREE AT HOME!
Have you ever wondered what a Degree might be worth to you in your job or career?It means a lot---Americans with an Associate Degree average nearly $10,000 more in yearly earnings than those with just a High School Diploma.
Harcourt Learning Direct offers you a way to get a Specialized Associate Degree in 11 of today’s growing fields--without having to go to college full time.With Harcourt,you study at home,in your spare time---so you don’t have to give up your present job while you train for a better one.Choose from exciting majors like Business Management,Accounting,Dressmaking & Design,Bookkeeping,Photography,Computer Science,Engineering,and more!
Your training includes everything you need
Books,lessons,learning aids--even professional quality tools and equipment--everything you need to master your training and move ahead to a new career is included in the low tuition(学费)price you pay.
Your education is nationally recognized!
Nearly 2,000 American companies---including General Electric,IBM,Mobil,General Motors,Ford,and many others have used our training for their employees.If companies like these recognize the value of our training,you can be sure that employers in your area will,too!
Earn yomr degree in as little as two years!Get a career diploma in just six months!
The career of your dreams is closer than you think!Even if you have no experience before,you can get valuable job skills in today’s hottest fields!Step-by-steplessons make learning easy.Prepare for promotions,pay rises,even start a business of your own!
Send today for FREE information about Harcourt at-home training!
Simply fill in your name and address on the coupon(登记表)above.Then,write in the name and number of the one program you’re most interested in,and mail it today.We’ll rush you free information about how you can take advantage of the opportunities in the field you’ve chosen.Act today!
Mail coupon today!Or call the number below 1-800-372-1589. Call anytime.24 hours a day,7 days a week.
www.harcourt-learning.com
E-mail:[email protected].com
1.Who will probably answer this advertisement?
A.College students preparing to work in some big companies. |
B.College students preparing to study for a degree. |
C.High school graduates preparing to have at-home training. |
D.High school graduates preparing for college entrance examinations. |
2.How can people get a Specialized Associate Degree?
A.They can study abroad for two years. |
B.They can work in some big famous companies. |
C.They can study in their spare time. |
D.They can do full-time learning at schoo1. |
3.Harcourt training has been used by the following companies for its employees except .
A.MobiI | B.Ford | C.IBM | D.Harvard University |
4.If you want to contact Harcourt Learning Direct,you can .
A.send an E-mail | B.visit the office on weekdays |
C.send a letter not later than today | D.make a call on weekdays only |
高三英语阅读理解简单题查看答案及解析
GET YOUR DEGREE AT HOME!
Have you ever wondered what a Degree might be worth to you in your job or career(事业)? It means a lot of Americans with an Associate Degree average nearly $10,000 more in yearly earnings than those with just a High School Diploma(毕业证).
Harcourt Learning Direct offers you a way to get a Specialized Associate Degree in 11 of today’s growing fields-without having to go to college full time. With Harcourt, you study at home, in your spare time__so you don’t have to give up your present job while you train for a better one. Choose from exciting majors like Business Management, Accounting, Dressmaking &Design, Bookkeeping, Photography, Computer Science, Engineering, and more! Your training includes everything you need! Books, lessons, learning aids__even professional-quality tools and equipment__everything you need to master your training and more ahead to a new career is included in the low tuition(学费) price you pay. Your education is nationally recognized! Nearly 2,000 American companies__including General Electric, IBM, Mobile, General Motors, Ford, and many others__have used our training for their employees. If companies like these recognize the value of our training, you can be sure that employees in your area will, too!
Earn your degree in as little as two years! Get a career diploma in just six months! The career of your dreams is closer than you think! Even if you have no experience before, you can get valuable job skills in today’s hottest fields! Step-by-step lessons make learning easy. Prepare for promotions(提升), pay raises, even start a business of your own! Send today for FREE information about Harcourt at home training!
Simply fill in your name and address on the coupon(票券) above. Then write in the name and number of the one program you’re most interested in, and mail it today. We’ll rush your free information about how you can take advantage of the opportunities(机会) in the field you’ve chosen. Act today!
Mail coupon today!
or call the number below
1-800-372-1589 Call anytime, 24 hours a day, 7 days a week.
www. harcourt-learning.com
E-mail: harcourt@learning.com
1.This advertisement aims at calling on people to ________.
A.attend full-time universities
B.work part time to further their education
C.improve their education at home to get better jobs
D.earn their degrees in different ways that suit them
2.Which of the following is NOT clearly mentioned in this advertisement?
A.The way how you will get your degree.
B.Tuition price.
C.The hot fields you will be preparing yourself for.
D.The length of time it will take you to get a degree.
3.What does the writer of this ad intend to say by naming General Electric, IBM, Ford, etc.?
A.To show that their training is widely used in the country.
B.To show that the training program is fully supported by famous companies in the U. S.
C.To prove the value of their training in every area.
D.To show the importance of getting recognized by the most famous companies.
4.It seems to the writer that the greatest attraction for people to take their training is______.
A.its convenience
B.the degree’s nation-wide recognition
C.the economic benefit it will bring about
D.the hot fields the training will help people to enter
高三英语阅读理解中等难度题查看答案及解析
GET YOUR DEGREE AT HOME!
Have you ever wondered what a Degree might be worth to you in your job or career? It means a lot of Americans with an Associate Degree average nearly $10,000 more in yearly earnings than those with just a High School Diploma.
Harcourt Learning Direct offers you a way to get a Specialized Associate Degree in 11 of today’s growing fields—without having to go to college full time. With Harcourt, you study at home, in your spare time, so you don’t have to give up your present job while you train for a better one. Choose from exciting majors like Business Management, Accounting, Dressmaking &Design, Bookkeeping, Photography, Computer Science, Engineering, and more! Your training includes everything you need! Books, lessons, learning aids even professional-quality tools and equipment everything you need to master your training and more ahead to a new career is included in the low tuition price you pay. Your education is nationally recognized! Nearly 2,000 American companies including General Electric, IBM, Mobile, General Motors, Ford, and many others have used our training for their employees. If companies like these recognize the value of our training, you can be sure that employees in your area will, too!
Earn your degree in as little as two years! Get a career diploma in just six months! The career of your dreams is closer than you think! Even if you have no experience before, you can get valuable job skills in today’s hottest fields! Step-by-step lessons make learning easy. Prepare for promotions, pay raises, even start a business of your own! Send today for FREE information about Harcourt at home training!
Simply fill in your name and address on the coupon(票券登记表) above. Then write in the name and number of the one program you’re most interested in, and mail it today. We’ll rush your free information about how you can take advantage of the opportunities in the field you’ve chosen. Act today! Mail coupon today or call the number below:
1-800-372-1589 Call anytime, 24 hours a day, 7 days a week.
www. harcourt-learning.com
E-mail: harcourt@learning.com
1.This advertisement aims at calling on people to ________.
A. attend full-time universities
B. work part time to further their education
C. improve their education at home to get better jobs
D. earn their degrees in different ways that suit them
2.Which of the following is NOT clearly mentioned in this advertisement?
A. The way how you will get your degree.
B. Tuition price.
C. The hot fields you will be preparing yourself for.
D. The length of time it will take you to get a degree.
3.What does the writer of this ad intend to say by naming General Electric, IBM, Ford, etc.?
A. To show that their training is widely used in the country.
B. To show that the training program is fully supported by famous companies in the U. S.
C. To prove the value of their training in every area.
D. To show the importance of getting recognized by the most famous companies.
4.It seems to the writer that the greatest attraction for people to take their training is ________.
A. its convenience
B. the degree’s nation-wide recognition
C. the economic benefit it will bring about
D. the hot fields the training will help people to enter
高三英语阅读理解中等难度题查看答案及解析
Get Your Degree at Home!
Have you ever wondered what a Degree might be worth to you in your job or career? It means a lot—Americans with an Association Degree average nearly $10,000 more in yearly earnings than those with just a High School Diploma.
Harcourt Learning Direct offers you a way to get a Specialized Associate Degree in 11 of today’s growing fields—without having to go to college full time. With Harcourt, you study at home, in your spare time—so you don’t have to give up your present job while you train for a better one. Choose from exciting majors like Business Management, Accounting, Dressmaking &Design, Bookkeeping, Photography, Computer Science, Engineering and more!
Your training includes everything you need!
Books, lessons, learning aids—even professional-quality tools and equipment—everything you need to master your training and move ahead to a new career is included in the low tuition price you pay.
Your education is nationally recognized!
Nearly 2,000 American companies—including General Electric, IBM, Mobil, General Motors, Ford, and many others—have used our training for their employees. If companies like these recognize the value of our training, you can be sure that employers in your area will, too!
Earn your degree in as little as two years! Get a career diploma in just six months!
The career of your dreams is closer than you think. Even if you have no experience before, you can get valuable job skills in today’s hottest fields! Step-by-step lessons make learning easy. Prepare for promotions, pay raise, even start a business of your own!
Send today for FREE information about Harcourt at-home training!
Simply fill in your name and address on the coupon(登记表) above. Then, write in the name and number of the one program you're most interested in, and post it today. We’ll rush you free information about how you can take advantage of the opportunities in the field you’ve chosen. Act today!
Mail coupon today! Or call the number below
1-800-372-1589
Call anytime, 24 hours a day, 7 days a week
www. .harcourt-learning.com
e-mail: harcourt@learning.com
1.What kind of people will probably answer this advertisement?
A.College students preparing to work in some big companies. |
B.college students preparing to study for a degree. |
C.High school graduates preparing to have at-home training. |
D.High school graduates preparing for college entrance examinations. |
2. People can get a Specialized Associate Degree by_______.
A.doing full-time learning at school |
B.working in some big famous companies |
C.studying in their spare time |
D.studying abroad for two years |
3.How can you contact Harcourt Learning Direct?
A.By sending an E-mail. |
B.By visiting the office on weekdays. |
C.By making a call on weekdays only. |
D.By sending a letter not later than today. |
高三英语阅读理解中等难度题查看答案及解析
Have you ever wondered what a Degree might be worth to you in your job or career? It means a lot of Americans with an Associate Degree average nearly $10,000 more in yearly earnings than those with just a High School Diploma(毕业证).
Harcourt Learning Direct offers you a way to get a Specialized Associate Degree in 11 of today’s growing fields-without having to go to college full time. With Harcourt, you study at home, in your spare time -- so you don’t have to give up your present job while you train for a better one. Choose from exciting majors like Business Management, Accounting, Dressmaking &Design, Bookkeeping, Photography, Computer Science, Engineering, and more! Your training includes everything you need! Books, lessons, learning aids-even professional-quality tools and equipment -- everything you need to master your training and more ahead to a new career is included in the low tuition price you pay. Your education is nationally recognized! Nearly 2, 000 American companies -- including General Electric, IBM, Mobile, General Motors, Ford, and many others -- have used our training for their employees. If companies like these recognize the value of our training, you can be sure that employees in your area will, too!
Earn your degree in as little as two years! Get a career diploma in just six months! The career of your dreams is closer than you think! Even if you have no experience before, you can get valuable job skills in today’s hottest fields! Step-by-step lessons make learning easy. Prepare for promotions(提升), pay raises, even start a business of your own! Send today for FREE information about Harcourt at home training!
Simply fill in your name and address on the coupon(票券) above. Then write in the name and number of the one program you’re most interested in, and mail it today. We’ll rush your free information about how you can take advantage of the opportunities in the field you’ve chosen. Act today!
Mail coupon today! Or call the number below 1-800-372-1589. Call any time, 24 hours a day, 7 days a week. www. Harcourt-learning. com E-mail:Harcourt@learning. com.
1.This advertisement aims at calling on people to ________.
A. attend full-time universities
B. work part time to further their education
C. improve their education at home to get better jobs
D. earn their degrees in different ways that suit them
2.Which of the following is NOT clearly mentioned in this advertisement?
A. The way how you will get your degree.
B. Tuition price.
C. The hot fields you will be preparing yourself for.
D. The length of time it will take you to get a degree.
3.What does the writer of this ad intend to say by naming General Electric, IBM, Ford, etc.?
A. To show that their training is widely used in the country.
B. To show that the training program is fully supported by famous companies in the U. S.
C. To prove the value of their training in every area.
D. To show the importance of getting recognized by the most famous companies.
4. How many ways are mentioned in the ad for people to get in touch with the Harcourt Learning Direct?
A. One. B. Two. C. Three. D. Four.
高三英语阅读理解中等难度题查看答案及解析
Have you ever wondered what a Degree might be worth to you in your job or career? It means a lot. Americans with an Associate Degree average nearly $10,000 more in yearly earnings than those with just a High School Diploma.
Harcourt Learning Direct offers you a way to get a Specialized Associate Degree in 11 of today’s growing fields – without having to go to college full-time. With Harcourt, you study at home, in your spare time so you don’t have to give up your present job while you train for a better one. Choose from exciting majors like Business Management, Accounting, Dressmaking & Design, Bookkeeping, Photography, Computer Science, Engineering, and more!
Your training includes everything you need!
Books, lessons, learning aids---even professional-quality tools and equipment --- everything you need to master your training and move ahead to a new career is included in the low tuition (学费) price you pay.
Your education is nationally recognized!
Nearly 2,000 American companies --- including General Electric, IBM, Mobil, General Motors, Ford, and many others --- have used our training for their employees. If companies like these recognize the value of our training, you can be sure that employers in your area will, too!
Earn your degree in as little as two years! Get a career diploma in just six months!
The career of your dreams is closer than you think! Even if you have no experience before, you can get valuable job skills in today’s hottest fields! Step-by-step lessons make learning easy. Prepare for promotions, pay raises, or even start a business of your own.
Send today for FREE information about Harcourt at-home training!
Simply fill in your name and address on the coupon (登记表) above. Then, write in the name and number of the program you’re most interested in, and mail it today. We’ll rush your free information about how you can take advantage of the opportunities. In the field you’ve chosen. Act today!
Mail coupon today! Or call the number below 1-800-372-1589. Call anytime, 24 hours a day, 7 days a week. www.harcourt-learning.com
E-mail: [email protected]
1.What kind of people will probably answer this advertisement?
A. High school graduates preparing to have at-home training.
B. College students preparing to study for a degree.
C. College students preparing to work in some big companies.
D. High school graduates preparing for college entrance examination.
2.People can get a Specialized Associate Degree by _____________.
A. doing full-time learning at school
B. working in some big famous companies
C. studying in their spare time
D. studying abroad for two years
3.How can you contact Harcourt Learning Direct?
A. By visiting the office on weekdays.
B. By sending an e-mail.
C. By making a call on weekdays only.
D. By sending a letter not later than today.
高三英语阅读理解中等难度题查看答案及解析
In order to succeed, it is compulsory that you ____work with every fiber of your being.
A.might B.should C.could D.must
高三英语单项填空困难题查看答案及解析