Bollworms are a traditional threat to cotton crops.Young ones feed on the boll, the part of the
cotton plant that contains the seeds.
A bacterium known as Bt is able to kill bollworms and some other pests.Bt is short form for Bacillus thuringiensis.It was discovered in the early twentieth century.Farmers began using Bt as a natural pesticide(杀虫剂).
Then,in the 1990s,researchers found a way to grow cotton plants that contain a Bt gene.The genetically modified cotton plant produces toxins that kill bollworms.Farmers around the world are now growing an estimated fourteen million hectares of Bt cotton.
Cotton bollworms also attack other crops.But scientists in China recently reported that Bt cotton may help suppress bollworm in other crops growing nearby.
The study involved crops grown in six provinces of northern China between 1992 and 2008.The study area contained three million hectares of cotton and twenty-two million hectares of corn,peanuts,soybeans and vegetables.
The researchers say the study suggested that Bt cotton not only controls bollworm on the transgenic cotton,but also may reduce its presence on other crops.And that reduction,they say,may decrease the need for insecticide use in general.
But the researchers also pointed out concerns.They say bollworms could develop resistance to the cotton plants designed to resist them.And they noted that insects called mirids have become “key pests” of cotton in China.They said this is because of a decrease in pesticide use made possible by Bt cotton.
The researchers say they do not believe that Bt cotton alone can solve all insect problems.Instead,they say farmers in China should consider it just one part of pest management systems.
44.What is Bt in this passage?
A.It's a kind of hi-tech invention. B.It's a natural bacterium.
C.It's a kind of pest. D.It's a man-made pesticide.
45.Bt cotton has all the advantages EXCEPT that ________.
A.it resists bollworms
B.it does good to other crops growing around
C.it reduces the use of insecticide
D.it helps to develop new insects
46.The underlined word “ones” in the first paragraph refers to ________.
A.bollworms B.cotton crops C.cotton seeds D.pests
47.From the passage,we can infer ________.
A.farmers around the world are now growing a large area of Bt cotton
B.researchers are probably now searching for new ways to solve other cotton problems
C.bollworms could not exist in Bt cotton any longer
D.Chinese scientists found the way to grow Bt cotton
高二英语阅读理解简单题
Bollworms are a traditional threat to cotton crops.Young ones feed on the boll, the part of the
cotton plant that contains the seeds.
A bacterium known as Bt is able to kill bollworms and some other pests.Bt is short form for Bacillus thuringiensis.It was discovered in the early twentieth century.Farmers began using Bt as a natural pesticide(杀虫剂).
Then,in the 1990s,researchers found a way to grow cotton plants that contain a Bt gene.The genetically modified cotton plant produces toxins that kill bollworms.Farmers around the world are now growing an estimated fourteen million hectares of Bt cotton.
Cotton bollworms also attack other crops.But scientists in China recently reported that Bt cotton may help suppress bollworm in other crops growing nearby.
The study involved crops grown in six provinces of northern China between 1992 and 2008.The study area contained three million hectares of cotton and twenty-two million hectares of corn,peanuts,soybeans and vegetables.
The researchers say the study suggested that Bt cotton not only controls bollworm on the transgenic cotton,but also may reduce its presence on other crops.And that reduction,they say,may decrease the need for insecticide use in general.
But the researchers also pointed out concerns.They say bollworms could develop resistance to the cotton plants designed to resist them.And they noted that insects called mirids have become “key pests” of cotton in China.They said this is because of a decrease in pesticide use made possible by Bt cotton.
The researchers say they do not believe that Bt cotton alone can solve all insect problems.Instead,they say farmers in China should consider it just one part of pest management systems.
44.What is Bt in this passage?
A.It's a kind of hi-tech invention. B.It's a natural bacterium.
C.It's a kind of pest. D.It's a man-made pesticide.
45.Bt cotton has all the advantages EXCEPT that ________.
A.it resists bollworms
B.it does good to other crops growing around
C.it reduces the use of insecticide
D.it helps to develop new insects
46.The underlined word “ones” in the first paragraph refers to ________.
A.bollworms B.cotton crops C.cotton seeds D.pests
47.From the passage,we can infer ________.
A.farmers around the world are now growing a large area of Bt cotton
B.researchers are probably now searching for new ways to solve other cotton problems
C.bollworms could not exist in Bt cotton any longer
D.Chinese scientists found the way to grow Bt cotton
高二英语阅读理解简单题查看答案及解析
单词拼写(每小题1分,共10分)
1.These clothes are 100%______(纯的)cotton.
2.He was too young and ______(肤浅) to understand his parents’ love.
3.Without______(暂停)we jumped into the boat with the other whalers.
4.I have to prepare tomorrow’s lessons and do some______(文书工作).
5.Please call me before you buy a new______(数码的)camera.
6.The work took a whole ______(两周)。
7.Do you want to be an______ (宇航员)in the future?
8.He returned to his ______(祖国) after graduation.
9.The other day I was showing the boys the_______(每周的) experiment.
10.Last______(十二月)we went to the Great Wall.
高二英语单词拼写中等难度题查看答案及解析
The threats to the health of astronauts in space are very different from ______ on earth.
A. ones B. that C. it D. those
高二英语单项填空中等难度题查看答案及解析
Roughly speaking, teachers in traditional education may feel that students are too young to know much about the world, and have to be told what to do most of the time. By contrast, open education offers teachers quite different feelings. Students are expected to be responsible for their own education—to discover subjects by themselves instead of being made to study them. This way of teaching allows the students to grow independently and to develop their own interests in many subjects. Some students who do badly in a traditional classroom will be happier in an open classroom and enjoy learning. They will not have to worry about grades or rules at all.
However, many students won’t do well in an open classroom. For these students, they will do little in school if there are too few rules. They will not make good use of open education, which is so different from traditional class, because they may have a problem getting used to making so many choices on their own. For them it is important to have some rules to direct them. They may worry about the rules even when there are no rules. In addition to that, some traditional teachers do not believe in open education and do not like it either.
Since both of some good points and bad points of the open education have been explained clearly, you may have your own opinion on the issue. Personally, I think that the concept of open education is good only in theory. In actual fact, it may not work very well in a real class or school. I believe, most students, but of course not all students, need some structure in their classes. They may want and need to have rules.
In some cases, they must be made to study some subjects. Many students are pleased to find subjects they have to study interesting. They would not study those subjects if they did not have to.
1.Open education allows the students to_________________.
A.grow as the educated |
B.be responsible for their life |
C.discover subjects outside class |
D.develop their own interests |
2.Open education may be a good idea for the students who __________.
A.worry about grades and rules |
B.aren’t used to making choices |
C.do well in a traditional classroom |
D.enjoy having some rules in class |
3.Some students will do little in an open classroom because___________.
A.there are too many rules |
B.they don’t like activities |
C.there are too few rules |
D.they worry about the rules |
4.Which of the following best summarizes the passage?
A.Open education is a really complex idea. |
B.Open education is better than traditional education. |
C.Traditional teachers don’t believe in open education. |
D.The writer thinks open education is practical. |
高二英语阅读理解困难题查看答案及解析
Teenagers at one German school are learning how to achieve happiness alongside other traditional subjects such as math and languages.
The class sit in a circle with their eyes shut and they count from one to ten: someone starts, the next voice comes from the far right, a third from the other side.
The aim of the game is to listen for an opportunity to shout out the number without clashing (冲突) with another voice or leaving a pause. On the first try, most of the young Germans try to be first, while a few are too shy to join in, but by the fifth time round, they develop a rhythm. The message: give other people space but also confidently claim your own. This is a requirement for social well-being.
The Willy Hellpach School in Heidelberg is the first in the nation to develop a happiness course. It is intended for students preparing for university entrance exams.
"The course isn't there to make you happy," Ernst Fritz -Schubert, the school principal, warned pupils, "but rather to help you discover the ways to become happy."
Cooking a meal together is one of the class exercises. Improving body language under the guidance of two professional actresses is another.
The course is taught for three periods a week. Despite the happy subject, the pupils themselves insist it is no laughing matter.
"In the first period, we had to each say something positive about another member of the class and about ourselves. No laughing at people." said Fanny, 17.
Research by the school shows it is not the first to start happiness classes: they also exist at some U. S. universities, mainly based on positive thinking, using findings from studies of depression.
1.What's the writing purpose of this passage?
A. To help students struggle against being sad.
B. To describe all the traditional courses.
C. To arouse the readers' interest in happiness.
D. To introduce the happiness course.
2.The game intended for the students in the 2nd paragraph is mainly to _________.
A. try their best to get opportunities for themselves
B. practice how to speak in front of people
C. equip them with required social skills
D. confidently speak out one's opinions
3.According to the passage, the happiness course is _________.
A. to help students discover the ways to happiness
B. to make all the students happy all the time
C. required to be taken by the first year students
D. created by the Willy Hellpach School
4.It can be inferred from the passage that _________.
A. the students can certainly become happy after the course
B. the students just took the course as a laughing matter
C. the students' self'-respect can also improve happiness
D. the students waste time learning something without value
高二英语阅读理解中等难度题查看答案及解析
Now many young people are traveling around the world on their own, not because they have no one to travel with, but because they prefer to go alone.
Kristina Wegscheider from California first traveled alone when she was at college and believes that it is something everyone should do at least once in their life. “It opens up your mind to new things and pushes you out of your comfort zone.” Wegscheider has visited 46 countries covering all seven continents.
In foreign countries, with no one to help you read a map, look after you if you get ill, or lend you money if your wallet is stolen, it is challenging. This is what drives young people to travel alone. It is seen as character building and a chance to prove that they can make it on their own.
Chris Richardson decided to leave his sales job in Australia to go traveling last year. He set up a website, The Aussie Nomad, to document his adventures. He says he wished he had traveled alone earlier. “The people you meet, the places you visit, or the things you do, everything is up to you and it forces you to grow as a person,” said the 30-year-old man.
Richardson describes traveling alone like “a shot in the arm”, which “makes you a more confident person that is ready to deal with anything”. He said, “The feeling of having overcome something on my own is a major part of what drives me each day when I’m dealing with a difficult task. I walk around with my head up because I know deep down inside that nothing is impossible if you try.”
The great 19thcentury explorer John Muir once said, “Only by going alone in silence can one truly get into the heart of the wilderness.”
1.Which of the following will Kristina Wegscheider agree with?
A. Traveling alone is a necessary experience for everyone.
B. It is more meaningful to travel in foreign countries.
C. It is comfortable to travel around without a friend.
D. Traveling abroad helps people to find new things.
2.Traveling alone is challenging because ________.
A. you have to make things on your own
B. it is hard for you to prove yourself to others
C. you can only depend on yourself whatever happens
D. it will finally build your character
3.What can we infer about Chris Richardson?
A. He started traveling alone at an early age.
B. He was once shot in the arm.
C. He used to work as a salesman.
D. His website inspires others a lot.
4.What is the best title for the passage?
A. Travel Abroad B. Travel Alone
C. Travel Light D. Travel Wide and Far
高二英语阅读理解简单题查看答案及解析
This special strain of rice makes _________ possible to produce one third more of the crop in the same fields.
A. it B. them C. which D. that
高二英语单项填空中等难度题查看答案及解析
To be clear, plastic bags are rightly thought of as a threat that's harmful to human health. According to the National Resources Defense Council, over a decade ago, the average American family took home almost 1,500 plastic shopping bags a year, filling our cabinets, kitchen drawers, and landfills (垃圾填埋场). Today the numbers are slightly better: According to National Geographic, as of 2018, shoppers in the United States use almost one plastic bag per resident per day.
This is not a story on the evil of plastics, but on whether the reusable bag can justify its existence. Although more environmentally friendly than traditional single-use plastic bags, reusable bags, depending on what they are made of, are more energy-intensive (耗能) to recycle.
According to a report by the United Nations Environment Program, “depending on what they are made of, reusable bags might have to be deconstructed in a costly recycling process to separate the different materials. As a result, in many cases, reusable bags are not recycled." That means despite the best intentions, millions of reusable bags designed to replace the need for traditional plastic shopping bags, will also end up in landfills.
Another point to consider, not all reusable bags are equal in terms of their recyclability. There are a wide range of reusable bag options on the market, and reusable bags tend to be made of more than one material to give the bag added reinforcement (耐用) and added street fashion. On a life cycle basis, stronger, heavier bags-no matter what material they are made of-will have a more severe environmental effect. That's because heavier bags use more resources to produce as well as distribute.
Just like plastic bags did, reusable bags multiply rapidly. Used for promotional (促销的)purposes and marketing of all kinds, reusable bags' growing popularity means bags that have been used very little (or not at all) can be found piled in streets, in garbage cans in city parks, and basically everywhere. Therefore, consumers have come to see them as disposable, defeating their very purpose.
In the end, the best practice for reusable bags is to have no half measures: Either use them all the time or don't use them at all. Using a reusable bag once or twice, and then throwing it away, doesn't do the environment any favors.
1.What can we learn from the passage?
A.Plastic bags are refused by environmentalists.
B.Shops in America have limited the use of plastic bags.
C.The need of strong and fashionable reusable bags is more than the supply.
D.Reusable bags demand more resources to produce and recycle than expected.
2.The words “very purpose" in Paragraph 6 refer to the intention of __________.
A.being left in landfills
B.being used as much as possible
C.replacing plastic bags
D.promoting goods on the market
3.Which of the following would be the best title for the passage?
A.How to Recycle Reusable Bags
B.Disadvantages of Plastic Bags
C.Reusable Bags? Think Twice!
D.Plastic Bags, Less Popular?
4.Which of the following shows the development of ideas in the passage?
I: Introduction CP: Central Point P: Point Sp: Sub-point (次要点) C: Conclusion
A. B.
C. D.
高二英语阅读理解中等难度题查看答案及解析
The rice made _____ possible to produce one-third more of the crop in the same field.
A. that B. this C. one D. it
高二英语单项填空简单题查看答案及解析
We are all aware _________ the many threats _________ the environment and we need to take action to prevent us from the bad consequences.
A. of; to B. of; on C. that; to D. that; on
高二英语单项填空中等难度题查看答案及解析