Using natural and organic products for skincare is increasingly popular-and that includes suncream. Many websites, including Pinterest and Instagram, feature users' recipes for homemade suncream. Judging from the comment, the rise in interest for homemade suncream is because some people fear the chemicals in shop-bought suncream and believe that natural products mixed at home will be better at protecting them from the sun's harmful rays. The fear originates from recent news that some suncream elements seem to disturb hormones (荷尔蒙).
Many of the homemade suncream recipes contain elements like shea butter and cocoa butter as well as coconut and vitamin E oils. The sun protection factor (SPF) values for these elements, according to the authors of these recipes, are between four and six. These SPF values, if true, are not enough to protect the skin against the harmful effects of sunlight. Some recipes include carrot seed essential oil, which the authors claim to have an SPF of 35-40. But this is unlikely, given the small amount used in these recipes. The European Commission recommended SPF factor for moderate skin protection is 15-29 (and 30-50+ for high protection).
The sun's most harmful rays are ultraviolet (UV) radiation-notably UVB and UVA radiation. UVB has a shorter wavelength and doesn't go far into the skin, but it is very dangerous as it can change the DNA in skin cells and cause skin cancer. UVA has a longer wave- length and can go much deeper into the skin. UVA can cause harmful reactive oxygen molecules (分子)called “free radicals” to form. These molecules can damage fat, protein and DNA in the skin, thereby weakening the normal function of skin cells.
Shop-bought suncream contains approved UV-blocking molecules that block UVA and UVB rays. Zinc oxide (氧化锌)is one of these UV-blocking materials. It has been extensively tested to determine the most effective size for blocking harmful rays. It is not clear whether the zinc oxide powder recommended for the homemade recipes meets with the recommended size or proportion needed.
1.What may concern consumers of the shop-bought suncream?
A.The price of it. B.The hormones in it.
C.The chemicals in it. D.The production process of it.
2.What are SPF values used for?
A.Measuring the amount of chemicals in suncream.
B.Measuring the harm suncream do to people.
C.Measuring the hormone level of suncream.
D.Measuring the protective effect of suncream.
3.What does paragraph 3 mainly talk about?
A.How sun protection products work.
B.What harm the sun's rays bring to skin.
C.How the sun's most harmful rays form.
D.How UVB and UVA radiation can be blocked.
4.What can be inferred from the last paragraph?
A.Shop-bought suncream needs more tests.
B.More zinc oxide powder is beneficial to skin.
C.Shop-bought suncream is more suitable for people.
D.More chemicals will be added into shop-bought suncream.
高三英语阅读理解中等难度题
Using natural and organic products for skincare is increasingly popular-and that includes suncream. Many websites, including Pinterest and Instagram, feature users' recipes for homemade suncream. Judging from the comment, the rise in interest for homemade suncream is because some people fear the chemicals in shop-bought suncream and believe that natural products mixed at home will be better at protecting them from the sun's harmful rays. The fear originates from recent news that some suncream elements seem to disturb hormones (荷尔蒙).
Many of the homemade suncream recipes contain elements like shea butter and cocoa butter as well as coconut and vitamin E oils. The sun protection factor (SPF) values for these elements, according to the authors of these recipes, are between four and six. These SPF values, if true, are not enough to protect the skin against the harmful effects of sunlight. Some recipes include carrot seed essential oil, which the authors claim to have an SPF of 35-40. But this is unlikely, given the small amount used in these recipes. The European Commission recommended SPF factor for moderate skin protection is 15-29 (and 30-50+ for high protection).
The sun's most harmful rays are ultraviolet (UV) radiation-notably UVB and UVA radiation. UVB has a shorter wavelength and doesn't go far into the skin, but it is very dangerous as it can change the DNA in skin cells and cause skin cancer. UVA has a longer wave- length and can go much deeper into the skin. UVA can cause harmful reactive oxygen molecules (分子)called “free radicals” to form. These molecules can damage fat, protein and DNA in the skin, thereby weakening the normal function of skin cells.
Shop-bought suncream contains approved UV-blocking molecules that block UVA and UVB rays. Zinc oxide (氧化锌)is one of these UV-blocking materials. It has been extensively tested to determine the most effective size for blocking harmful rays. It is not clear whether the zinc oxide powder recommended for the homemade recipes meets with the recommended size or proportion needed.
1.What may concern consumers of the shop-bought suncream?
A.The price of it. B.The hormones in it.
C.The chemicals in it. D.The production process of it.
2.What are SPF values used for?
A.Measuring the amount of chemicals in suncream.
B.Measuring the harm suncream do to people.
C.Measuring the hormone level of suncream.
D.Measuring the protective effect of suncream.
3.What does paragraph 3 mainly talk about?
A.How sun protection products work.
B.What harm the sun's rays bring to skin.
C.How the sun's most harmful rays form.
D.How UVB and UVA radiation can be blocked.
4.What can be inferred from the last paragraph?
A.Shop-bought suncream needs more tests.
B.More zinc oxide powder is beneficial to skin.
C.Shop-bought suncream is more suitable for people.
D.More chemicals will be added into shop-bought suncream.
高三英语阅读理解中等难度题查看答案及解析
Being organized is an important skill for school and life. When you are well organized, you can stay focused, instead of spending time hunting things down. __61 For schoolwork, it means having one notebook or place where you store all your assignments, so you know what you have to do and when. Keeping labeled folders for handouts and keeping all your schoolwork neat and in a specific place –these are the main parts of organization.
For home stuff, being organized means having a place to put your things and putting them back as you go. __62 It means keeping your schoolbag, your shoes, and your clean underwear in the same places so you always know where to find them.
Planning is part of being organized, too. __63 Calendars, lists, and schedules can help you plan. You can buy or draw a calendar and keep it near your workplace. Making a schedule or “to-do” list for yourself is a good idea. Looking at your list helps you keep track of what you need to do. __64Check off things when you have done them. Use your list to help you decide which thing is most important to work on first. __65 .But once you have organized, it feels great. The less time you spend hunting around for things or panicking about homework, the more time you have for better things, like reading a good book or playing.
A.Add new things as you get assignments. |
B.First, you should get your schoolwork organized. |
C.It means hanging your coat up instead of dropping it on the floor or throwing it on a chair. |
D.It takes some extra efforts to organize yourself and your stuff. |
E. Planning means deciding what you will do and when you will do it.
F. You will benefit a lot form a good habit.
G. What does it mean to be organized?
高三英语信息匹配中等难度题查看答案及解析
Being organized is an important skill for school and life.When you're well organized, you can stay focused, instead of spending time hunting things down. __66__ For schoolwork, it means having one notebook or place where you store all your assignments, so you know what you have to do and when.Keeping labeled folders(贴有标签的文件夹) for handouts(课堂讲义)and keeping all your schoolwork neat and in a specific place—these are the main parts of organization.
For home stuff, being organized means having a place to put your things and putting them back as you go. __67__ It means keeping your schoolbag, your shoes, and your clean underwear in the same places so you always know where to find them.
Planning is part of being organized, too. __68_ Calendars, lists, and schedules can help you plan.You can buy or draw a calendar and keep it near your workplace.Making a schedule or “todo” list for yourself is a good idea.Looking at your list helps you keep track of what you need to do. __69__ Check off things when you've done them.Use your list to help you decide which thing is most important to work on first.
__70__ But once you're organized, it feels great.The less time you spend hunting around for things or panicking about homework, the more time you have for better things, like reading a good book or playing.
A.Planning means deciding what you will do and when you will do it. |
B.First, you should get your schoolwork organized. |
C.Add new thi Check off things when you've done them. |
D.You will benefit a lot from a good habit. |
E.What does it mean to be organized?
F.It takes some extra efforts to organize yourself and your stuff.
G.It means hanging your coat up instead of dropping it on the floor or throwing it on a chair.
高三英语信息匹配中等难度题查看答案及解析
Being organized is an important skill for school and life.When you’re well organized,you can stay focused,instead of spending time hunting things down and getting sidetracked.What does it mean to be organized?For schoolwork,it means having one notebook or place where you store all your assignments,so you know what you have to do and when.Keeping clearly labeled binders or folders for handouts and keeping all your schoolwork neat and in a specific place—these are the main parts of organization.
For home stuff,being organized means having a place to put your things and putting them back as you go.It means hanging your coat up instead of dropping it on the floor or throwing it on a chair.It means keeping your schoolbag,your shoes,and your clean underwear in the same places so you always know where to find them.
Planning is part of being organized,too.Planning means deciding what you will do and when you will do it.Calendars,lists,and schedules can help you plan.You can buy or draw a calendar and keep it near your workplace.Making a schedule or a “todo” list for yourself is a good idea.Looking at your list helps you keep track of what you need to do.Add new things as you get assignments,and check off things when you’ve done them.Use your list to help you decide which thing is the most important to work on first.
It takes some extra efforts to organize yourself and your stuff.But once you’re organized,you feel great.The less time you spend hunting around for things or panicking about homework,the more time you have for better things,like reading a good book or playing.
1. According to the first paragraph,“being organized” probably means “________”.
A.looking for something with others here and there
B.doing something according to the plan made ahead of time
C.getting together every now and then
D.telling you what you have to do every day
2. If you are well organized at home,you will________.
A.leave all the things as they are
B.hang your coat on a chair
C.know where your clean underwear is
D.ask your mom where your shoes are
3.Which one of the following is the right order of being organized?
a.Deciding what you have to do and when.
b.Finding a notebook where you can write down your “todo” list.
c.Getting rid of the things that have been done in the list.
d.Making a “todo” list for yourself.
A.b,a,d,c B.a,d,c,b
C.c,b,a,d D.d,c,b,a
4.What may be the best title for this passage?
A.Planning Is Part of Being Organized
B.A Good Beginning Is Half Done
C.Being Organized—an Important Skill
D.Where There Is a Will There Is a Way
高三英语阅读理解中等难度题查看答案及解析
School children are using mobile phone applications to do their homework, which seem to be increasing during summer vacations. But instead of blaming students for their behavior, we should say no to too much homework. This is important because by using mobile phone applications to do their homework, students don't add much to their knowledge, says an article in Guangzhou-based Yangcheng Evening News. Excerpts (摘录):
Using mobile phone applications to do homework is no different from copying from someone else's work. This is the opinion of a vast majority of teachers. Students who seek cell phone apps help to do their homework will pay dearly during major exams when they cannot seek the help of such applications, the teachers say.
The heavy load of homework Chinese students are burdened with, said to be the heaviest in the world,has led to the popularity of these applications.
Senior high school students in China rarely go to bed before 11 pm. A report in Shanghai published in2013 showed that students in the city on average spend 28.2 hours in class every week, the 9th highest among 65 countries and regions surveyed. Also, they spend an average of 13.8 hours a week doing homework, most in the world.
There is no association between the amount of homework one does and the amount of knowledge one gathers. In fact, a research by Australian experts shows that the result is exactly the opposite: the more hours students spend doing homework, the less effective they will be in gaining knowledge.
The United States is one of the countries where students do little homework, but that has not damaged the country's academic status in the world.
So, it's time Chinese schools understood this fact and freed students of the unnecessary burden of homework.
1.What’s the writer’s attitude toward the students’ using mobile phone applications to do their homework?
A. Supporting B. Understanding
C. Scolding D. Praising
2.The cause of the students’ using mobile phone applications to do their homework is______.
A. the heavy burden of homework
B. the advance of modern technology
C. the pressure of the students’ parents
D. the influence of other countries
3.What does the underlined phrase “pay dearly” mean?
A. be rewarded B. be dismissed
C. provide much money D. suffer a lot
4.Which of the following is probably the best title?
A. Free kids of the burden of homework.
B. Stop using mobile phones to do homework.
C. Spend less time to gain much knowledge.
D. Improve China’s academic status in the world.
高三英语阅读理解中等难度题查看答案及解析
DoSomething.org is the country’s largest non-profit organization for young people and social change. They provide some scholarships to reward teens who are social action leaders in their community. You may be interested in the following ones.
1. $2,000 Fight Climate Change like a Ninja(忍者) Scholarship
Ninjas release 86% less CO2 than the average person. Why? Because ninjas use a green form of transport ---- parkour(跑酷). DoSomething.org wants to teach you their ways of going green---- and offer the chance for a $2,000 scholarship. Submit(提交)one of your friends’ phone numbers. You’ll both receive a text message with ways to protect the planet, and you’ll be entered for the scholarship. Bonzail!
2. $3,000 Puppy Mills are Bad Scholarship
Use your phone to fight for millions of puppies born in abusive (虐待的) factory farms. Share a text messaging game on puppy mills with 6 friends and you’ll be entered to win a $3000 scholarship. Millions of puppies are born in horrible conditions each year, so puppy mills can make a profit. Invite your friends to step into the shoes of a pet store employee who discovers their store supports puppy mills. To enter for the $3,000 scholarship, visit www. Dosomething.org/puppy and submit six friends’ phone numbers.
3. $5,000 Safe Driving Scholarship
When you text while driving at 55 mph, your eyes go off the road for the length of an entire football field. Tell your friends about the danger of texting while driving to enter to win a $5000 scholarship. After entering, we’ll send you a free pair of “thumb socks” ---- a physical reminder to stop texting while driving. Send us a picture of you with your thumb socks and you’ll double your chance of winning the $5,000 scholarship.
1.What do the scholarships mentioned in the passage have in common?
A. They are provided by DoSomething.org.
B. They offer a small gift to every attendant.
C. They require attendants to be top students.
D. They require attendants to play a message game.
2.Ninjas contribute to environmental protection by ______.
A. giving practical advice
B. offering a scholarship
C. avoiding driving cars
D. influencing the young
3.To win Puppy Mills are Bad Scholarship, you have to ______.
A. work as a pet store employee
B. share a game with 6 friends
C. be good at playing games
D. love puppy mills very much
4.What’s the purpose of Safe Driving Scholarship?
A. To hand out more thumb socks.
B. To teach people how to drive.
C. To sell as many thumb socks as possible.
D. To warn people not to text while driving.
5.After sending your picture with your thumb socks, ______.
A. you will receive another pair of thumb socks
B. you will necessarily win the scholarship
C. you will win $10,000 scholarship
D. you increase the opportunity of winning the scholarship
高三英语阅读理解中等难度题查看答案及解析
The company is quite honest and guarantees the new product ______ be under warranty for three years.
A.should B.shall C.will D.can
高三英语单项填空中等难度题查看答案及解析
22. The Interactional Red Cross is______non-profit organization that cares for the wounded, sick and homeless in wartime, and victims________of natural disasters.
A.the; the | B.a; the | C.the; 不填 | D.a;不填 |
高三英语单项填空简单题查看答案及解析
One thing that most organically grown food products seem to have in common is that they cost more than ________ grown foods.
A. apparently B. contradictorily C. conventionally D. punctually
高三英语单项填空简单题查看答案及解析
Petroleum, consisting of crude oil(原油) and natural gas, seems to originate from organic matter in marine sediment(海洋沉淀物).Tiny organisms settle to the seafloor and gather in marine mud. The organic matter may partially break down, using up the dissolved oxygen in the sediment. As soon as the oxygen is gone, decay stops and the remaining organic matter is preserved.
Continued sedimentation buries the organic matter and subjects it to higher temperatures and pressures, which change the organic matter to oil and gas. As muddy sediments are pressed together, the gas and small drops of oil may be squeezed out of the mud and may move into sandy layers nearby. Over millions of years, accumulations of gas and oil can collect in the sandy layers. Both oil and gas are less dense than water, so they generally tend to rise upward through rock and sediment.
Oil pools are valuable underground accumulations of oil, and oil fields are regions underlain by one or more oil pools. When an oil pool or field is discovered, wells are drilled into the ground. When the well reaches a pool, oil usually rises up the well because of its density difference(密度差) with water beneath it or because of the pressure of expanding gas trapped above it. Although this rise of oil is almost always carefully controlled today, strong natural flows of oil were common in the past. Gas pressure gradually dies out, and oil is pumped from the well. Water or steam may be pumped down neighboring wells to help push the oil out.
As oil becomes increasingly difficult to find, the search for it is extended into more unfriendly environments. The development of the oil field on the North Slope of Alaska and the construction of the Alaska pipeline are examples of the great expense and difficulty involved in new oil discoveries. Offshore drilling platforms extend the search for oil to the ocean’s continental shelves. More than one-quarter of the world’s oil and almost one-fifth of the world’s natural gas come from offshore, even though offshore drilling is six to seven times more expensive than drilling on land.
Of course, there is far more oil underground than can be recovered. Even given the best exploration techniques, only about 30 to 40 percent of the oil in a given pool can be brought to the surface. The rest is far too difficult to reach and has to remain underground.
1.Which of the following is true about petroleum formation?
A. Microscopic organisms that live in mud produce crude oil and natural gas.
B. Large amounts of oxygen are needed for petroleum formation to begin.
C. Petroleum is formed when organic material in sediments combines with decaying organisms.
D. Petroleum formation appears to begin in marine sediments where organic matter exists.
2.What does the development of the Alaskan oil field mentioned illustrate?
A. More petroleum is extracted from the sea than from land.
B. Drilling for oil requires huge financial investments.
C. The global demand for oil has been increasing over the years.
D. The North Slope of Alaska has substantial amounts of oil.
3.What does the author mainly intend to tell us in the passage?
A. The formation, processing and exploration of petroleum
B. The specific techniques involved in oil exploration.
C. The changing relationships between countries.
D. The future intense situation in oil product markets.
4.What can we infer from the passage?
A. Available exploration techniques serve our purpose of exploring oil very well.
B. More and more public regions will be further protected from being drilled in the future.
C. Countries may suffer from unpleasant relationships for respective benefits in exploring oil.
D. Powerful flows of oil is a phenomenon which can be witnessed rarely now.
高三英语阅读理解中等难度题查看答案及解析