The smallest kids on Earth are much smaller t...

The smallest kids on Earth are much smaller than you or your baby brother or sister. They’re even smaller than the hairs on your head. We call them “NanoPutians”(纳米小人). Also known as NanoKids, the NanoPutians aren’t real people. They are actually tiny molecules (分子) made to look a little bit like people.

James Tour invented the NanoPutians as a way to teach kids about nanoscience, which refers to the study of things that are smaller than about 100 or 200 nanometers. “The exact size is less important than the possible applications of working with such tiny things,” Tour says, “Nanoscience is the study and development of the small so that it will affect the large.”

One of the goals of the research is to control individual atoms. Carbon, hydrogen, oxygen, and other types of atoms are the building blocks of the universe. They make up planets, rocks, people, trees, CDs --- all the stuff out there. “Most things that people build come together in a top-down way”, Tour says. If you want to make a table, for instance, you cut down a big tree, make wooden boards, and hammer them together. Nature, on the other hand, builds things from the bottom up. When atoms join together they make molecules. Each molecule has a certain shape, and a molecule’s structure determines what it can do. Molecules can make them come together to make a cell --- or a tree.

Tour and his co-workers turned these molecular structures into cartoon figures and made an animated(动画的) science video about the little people, set it to music and started showing it to kids in school while talking about how exciting research on small things can be.

“Learning about the NanoKids has opened up a world of possibility for real kids who ordinarily would rather not study biology, chemistry or physics.” Tour says. When you look closely enough, the really small can be really cool.

1.What is the purpose of inventing NanoKids?

A. To clone two really similar children.

B. To arouse kids’ attention of the scientific world.

C. To know more about the top-down way.

D. To keep up with the development of nanotechnology.

2.How did Tour introduce the research on small things to kids?

A. By producing wonderful music.

B. By performing a play acted by kids.

C. By making animated science videos.

D. By turning molecular structures into little kids.

3.Which section of a newspaper is the text probably from?

A. Science.　　 B. Economy.

C. History.　　 D. Entertainment.

高二英语阅读理解简单题查看答案及解析

Are you carrying too much on your back at school? Lots of kids at the same age as you are. Not only are students in China ___1___ from this problem, but kids in the United States are ___2___ fed up with（饱受…之苦） heavy school bags.

Experts are starting to___3___ that more and more young students are having back and neck problems as a result of school bags ___4___ too heavy for them. “It’s hard for me to get up the___5___ with my bag because it’s so heavy,” said Rich Hammond, ___6___ 11-year-old student in the US. Rick is among the students who have ___7___ backpacks with two straps (带子) to carry them, ___8___ a number of other students choose rolling backpacks. However, even with rolling backpacks, ___9___ up stairs and buses with them is ___10___ a problem for kids. Many of them have hurt their knees, backs or necks because of heavy school bags.

But how much is too ___11___? Experts say students should carry ___12___ more than 10 to 15 per cent of their own body weight. Scott Bautch, a Wisconsin ___13___ doctor, said kids under 4th grade should ___14___ with 10 per cent. But it’s also important that older kids don’t go ___15___ 15 percent, because their bones are still growing. Bautch explained that there are other injuries caused by backpacks. “Kids are ___16___ their balance and falling down with these backpacks,” he said．

Parents and teachers are starting to tell the kids to only take ___17___ library books they will be reading that night. Some teachers are using worksheets (作业纸) or ___18___ workbooks for students to take home. One of the best answers is, as some ___19___ themselves suggested, to have no homework ___20___!

1.A．meeting          B．facing        C．experiencing   D．suffering

2.A．already       B．always           C．yet            D．also

3.A．explain          B．say           C．worry           D．announce

4.A．being            B．be            C．are             D．is

5.A．schools          B．stairs       C．houses          D．homes

6.A．this             B．that          C．a               D．an

7.A．special          B．unusual       C．ordinary        D．regular

8.A．when             B．but           C．then            D．and

9.A. getting          B．climbing      C．going           D．turning

10.A．only            B．still        C．even            D．just

11.A．more            B．very          C．much            D．many

12.A．no              B．not           C．any             D．much

13.A．children        B．student       C．bag             D．back

14.A．carry           B．stay          C．take            D．bring

15.A．about           B．under         C．beyond          D．before

16.A．keeping         B．missing        C．losing        D．making

17.A．home            B．class          C．school         D．city

18.A．valuable        B．thin          C．important      D．interesting

19.A．reports         B．teachers       C．parents        D．kids

20.A．at all          B．after all       C．in all          D．for all

高二英语完形填空中等难度题查看答案及解析

完形填空 （共20小题，每小题1分，满分20分）

Are you carrying too much on your back at school? Lots of kids at the same age as you are. Not only are students in China ___36___ from this problem, but kids in the United States are ___37___ fed up with（饱受…之苦） heavy school bags.

Experts are starting to___38___ that more and more young students are having back and neck problems as a result of school bags ___39___ too heavy for them. “It’s hard for me to get up the___40___ with my bag because it’s so heavy,” said Rich Hammond, ___41___ 11-year-old student in the US. Rick is among the students who have ___42___ backpacks with two straps (带子) to carry them, ___43___ a number of other students choose rolling backpacks. However, even with rolling backpacks, ___44___ up stairs and buses with them is ___45___ a problem for kids. Many of them have hurt their knees, backs or necks because of heavy school bags.

But how much is too ___46___? Experts say students should carry ___47___ more than 10 to 15 per cent of their own body weight. Scott Bautch, a Wisconsin ___48___ doctor, said kids under 4th grade should ___49___ with 10 per cent. But it’s also important that older kids don’t go ___50___ 15 percent, because their bones are still growing. Bautch explained that there are other injuries caused by backpacks. “Kids are ___51___ their balance and falling down with these backpacks,” he said．

Parents and teachers are starting to tell the kids to only take ___52___ library books they will be reading that night. Some teachers are using worksheets (作业纸) or ___53___ workbooks for students to take home. One of the best answers is, as some ___54___ themselves suggested, to have no homework ___55___!

36． A．meeting                B．facing                    C．experiencing   D．suffering

37． A．already       B．always             C．yet              D．also

38． A．explain             B．say               C．worry               D．announce

39． A．being              B．be                C．are               D．is

40．A．schools              B．stairs            C．houses             D．homes

41．A．this                 B．that             C．a                    D．an

42．A．special               B．unusual          C．ordinary            D．regular

43．A．when                B．but             C．then                  D．and

44．A. getting               B．climbing     C．going                D．turning

45．A．only                 B．still              C．even                D．just

46．A．more                B．very              C．much              D．many

47．A．no                  B．not              C．any                 D．much

48．A．children              B．student           C．bag                  D．back

49．A．carry               B．stay         C．take               D．bring

50．A．about              B．under        C．beyond               D．before

51．A．keeping             B．missing       C．losing              D．making

52．A．home              B．class         C．school              D．city

53．A．valuable             B．thin         C．important           D．interesting

54．A．reports              B．teachers      C．parents       D．kids

55．A．at all                B．after all      C．in all         D．for all

高二英语完型填空简单题查看答案及解析

Australia is the smallest continent in the world. It is a little smaller than China. It is on the Southern Hemisphere of the earth. Australia is big, but its population is small. The population of Australia is nearly as large as that of Shanghai.

Enough laws have been made to fight against pollution. The cities in Australia have little air or water pollution. The sky is blue and the water is clean. You can clearly see fish in the rivers. Plants grow very well.

Last month we visited Perth, the biggest city in Western Australia, and went to a wild flower exhibition. There we saw large numbers of wild flowers on show, most of which we had never seen before. We had a wonderful time. Perth is famous for its beautiful wild flowers. Every year in spring Perth has a wild flower exhibition. After visiting Perth, we spent a day in the countryside. We sat down and had a rest near a path at the foot of a hill. It was quiet and we enjoyed ourselves very much. When we heard bells ringing at the top of the hills, we looked up, but what we saw made us pick up all our things and run back to our car as quickly as we could. There were about three hundred sheep coming towards us along the path.

Australia is famous for its sheep and kangaroos（袋鼠）. After a short drive from any town, you will find yourself among the white sheep. Sheep, sheep, everywhere you can see sheep.

1.Which country is the writer most possibly from?

2.We can learn from the passage that _________.

3.Which of the following statements is NOT true according to the passage?

4.The underlined word “exhibition” in the third paragraph means _________.

高二英语阅读理解中等难度题查看答案及解析

Australia is the smallest continent in the world. It is a little smaller than China. It is on the Southern Hemisphere of the earth. Australia is big, but its population is small. The population of Australia is nearly as large as that of Shanghai.

Enough laws have been made to fight against pollution. The cities in Australia have little air or water pollution. The sky is blue and the water is clean. You can clearly see fish in the rivers. Plants grow very well.

Last month we visited Perth, the biggest city in Western Australia, and went to a wild flower exhibition. There we saw large numbers of wild flowers on show, most of which we had never seen before. We had a wonderful time. Perth is famous for its beautiful wild flowers. Every year in spring Perth has a wild flower exhibition. After visiting Perth, we spent a day in the countryside. We sat down and had a rest near a path at the foot of a hill. It was quiet and we enjoyed ourselves very much. When we heard bells ringing at the top of the hills, we looked up, but what we saw made us pick up all our things and run back to our car as quickly as we could. There were about three hundred sheep coming towards us along the path.

Australia is famous for its sheep and kangaroos. After a short drive from any town, you will find yourself among the white sheep. Sheep, sheep, everywhere you can see sheep.

1.Which country is the writer most possibly from?

A. Japan　　 B. Canada

C. China　　 D. America

2.We can learn from the passage that _________.

A. Australia is the smallest country in the world

B. Australia is the same size of Shanghai.

C. Australia is in the northern part of the earth.

D. The people in Australia are as many as those in Shanghai.

3.Which of the following statements is NOT true according to the passage?

A. Australia has enough laws to fight against pollution.

B. Perth is the biggest city in Australia.

C. The wild flowers in Perth must be different from what the author sees in his/her country.

D. The author enjoyed his/her visit in the country.

高二英语阅读理解中等难度题查看答案及解析

Are you carrying too much on your back at school? You’re not alone. Back experts in the USA were worried that young students are having back and neck problems because they are carrying too much in their backpacks (schoolbags).

“It hurts my back when I run,” said Eglin Reyes, a student in Virginia. “It’s hard to get up the stairs with my backpack because it’s too heavy.”

Students have to carry heavy backpacks on their backs for a whole week’s study. Beeline is one of them. They have regular backpacks with two straps(带子) to carry them, but a number of students with heavy loads have switched to rolling backpacks. The backpacks have wheels and can roll on the ground.

Shirley Park’s backpack weighs 10 kilos, and she said, “I’ll change to a rolling backpack because I am starting to have back pain.”

How much is too much? Experts say that students should carry no more than 10 to 15 percent of their own body weight. A few students have had a good idea to lighten the load: Less homework.

Doctor’s suggestions:

●Lighten the load. Take home only the books the students need that night.

●Wide straps are better. They can send out weight over your shoulders and be sure to wear backpacks with two straps.

●The heaviest things should be packed closest to the back.

●Bend(弯曲) both knees when you pick up the pack, don’t just bend the waist(腰).

1.The main idea of the passage is about _______.

A. the problems made by rolling backpacks

B. the advantage of backpacks

C. the best backpacks for students

D. how to lighten students’ backpacks

2.If a child carries a heavy school bag ,__________

A. his back and neck will be hurt

B. his head and arms will be hurt

C. his hands will be hurt

D. his feet will be hurt

3.By the words of the experts, it’s better for a student of 40 kilos to carry a backpack of at most _______.

A. 7 kilos　 B. 8 kilos

C. 6 kilos　　 D. 10 kilos

4.If students follow the doctor’s suggesting, they _______.

A. will know how to use backpacks

B. may feel their backpacks are lighter

C. can learn how to enjoy them

D. may do less homework

高二英语阅读理解中等难度题查看答案及解析

Did you know that women’s brains are smaller than men’s? The average women’s brain weighs 10% less than men’s. Since research has shown that the bigger the brain, the cleverer the animal, men must be more intelligent than women. Right? Wrong. Men and women always score similarly on intelligence tests, despite the difference in brain size. Why? After years of study, researchers have concluded that it’s what’s inside that matters, not just the size of the brain. The brain consists of　 “grey matter” .

It has been suggested that smaller brain appears to work faster, perhaps because the two sides of the brain are better connected in women. This means that little girls tend to learn to speak earlier, and that women can understand sorts of information from different sources at the same time. When it comes to talking to the boss on the phone, cooking dinner and keeping an eye on the baby all at the same time, it’s women who come out on top every time.

There are other important differences between two sexes. As white matter is the key to spatial(空间的) tasks, men know better where things are in relation to other things. “A great footballer always knows where he is in relation to the other players, and he knows where to go,” says one researcher. That may explain one of life’s great mysteries: why men refuse to ask for directions … and women often need to!

The differences begin when fetuses(胎儿) are about nine weeks old, which can be seen in the action of children and young as one. A boy would try to climb a barrier (障碍物) before him or push it down while a girl would attract help from others. These brain differences also explain the fact that more men take up jobs that require good spatial skills, while more women speech skills. It may all go back to our ancestors(祖先) ,among whom women needed speech skills to take care of their babies and men needed spatial skills to hunt, according to one research.

If all this disappoints you, it shouldn’t. “The brain changes throughout our lives according to what we do with it.” says a biologist.

1.Which of the following is true according to the first paragraph?

A. Women’s brain is 10% less than men’s.

B. Grey matter plays the same role as white matter.

C. Grey matter controls thinking in the brain.

D. Both sexes have the same amount of white matter.

2.What can we infer from the second and third paragraphs?

A. Women prefer doing many things at a time.

B. Men do better dealing with one job at a time.

C. Women do not need to tell directions.

D. Men have weaker spatial abilities.

3.Which of the following do you agree with according to the fourth paragraph?

A. Young boys may be stronger than young girls.

B. More women take up jobs requiring speech skills

C. Women may have stronger feelings than men.

D. Our ancestors needed more spatial skills.

4.What is the writer’s attitude in writing this passage?

A. Defensive.　　 B. Persuasive.

C. Supportive.　　 D. Objective.

高二英语阅读理解中等难度题查看答案及解析

Do you know that women’s brains are smaller than men’s? The average women’s brain weighs 10% less than men’s. Since researches have shown that the bigger the brain, the cleverer the animal, men must be more intelligent than women. Right? Wrong. Men and women always score similarly on intelligence tests, despite the difference in brain size. Why? After years of study, researchers have concluded that it’s what’s inside that matters, not just the size of the brain. The brain consists of “grey matter” and “white matter”. While men have more of the latter, the amount of “thinking” brain is almost exactly the same in both sexes.

It has been suggested that smaller brain appears to work faster, perhaps because the two sides of the brain are better connected in women. This means that little girls tend to learn to speak earlier, and that women can understand sorts of information from different sources at the same time. When it comes to talking to the boss on the phone, cooking dinner and keeping an eye on the baby all at the same time, it’s women who come out on top every time.

There are other important differences between two sexes. As white matter is the key to spatial(空间的) tasks, men know better where things are in relation to other things. “A great footballer always knows where he is in relation to the other players, and he knows where to go,” says one researcher. That may explain one of life’s great mysteries—why men refuse to ask for directions … and women often need to!

The differences begin when fetuses(胎儿) are about nine weeks old, which can be seen in the action of children as young as one. A boy would try to climb a barrier (障碍物) before him or push it down while a girl would attract help from others. These brain differences also explain the fact that more men take up jobs that require good spatial skills, while more women speech skills. It may all go back to our ancestors, among whom women needed speech skills to take care of their babies and men needed spatial skills to hunt, according to one research.

If all this disappoints you, it shouldn’t. “The brain changes throughout our lives according to what we do with it.” says a biologist.

1.Which of the following is true according to the first paragraph?

A. Women’s brain is 10% less than men’s

B. Grey matter plays the same role as white matter.

C. Grey matter controls thinking in the brain.

D. Both sexes have the same amount of white matter.

2.What can we infer from the second and third paragraphs?

A. Women prefer doing many things at a time.

B. Men do better dealing with one job at a time.

C. Women do not need to tell directions.

D. Men have weaker spatial abilities.

3. Which of the following do you agree with according to the fourth paragraph?

A. Young boys may be stronger than young girls.

B. More women take up jobs requiring speech skills.

C. Women may have stronger feelings than men.

D. Our ancestors needed more spatial skills.

4.What is the writer’s attitude in writing this passage?

A. Defensive. 　 　 B. Persuasive.

C. Supportive.　　 D. Objective.

高二英语阅读理解中等难度题查看答案及解析

Did you know that women’s brains are smaller than men’s?  The average women’s brain weighs 10% less than men’s．Since research has shown that the bigger the brain, the cleverer the animal, men must be more intelligent than women．Right? Wrong．Men and women always score similarly on intelligence tests, despite the difference in brain size．Why? After years of study, researchers have concluded that it’s what’s inside that matters, not just the size of the brain．The brain consists of “grey matter” and “white matter”．While men have more of the latter, the amount of “thinking” brain is almost exactly the same in both sexes．

It has been suggested that smaller brain appears to work faster, perhaps because the two sides of the brain are better connected in women．This means that little girls tend to learn to speak earlier, and that women can understand sorts of information from different sources at the same time．When it comes to talking to the boss on the phone, cooking dinner and keeping an eye on the baby all at the same time, it’s women who come out on top every time．

There are other important differences between two sexes．As white matter is the key to spatial tasks, men know better where things are in relation to other things．“A great footballer always knows where he is in relation to the other players, and he knows where to go,” says one researcher．That may explain one of life’s great mysteries: why men refuse to ask for direction and women often need to!

The differences begin when fetuses（胎儿）are about nine weeks old, which can be seen in the action of children as young as one．A boy would try to climb a barrier before him or push it down while a girl would attract help from others．These brain differences also explain the fact that more men take up jobs that require good spatial skills, while more women speech skills．It may all go back to our ancestors, among whom women needed speech skills to take care of their babies and men needed spatial skills to hunt, according to one research．

If all this disappoints you, it shouldn’t．“The brain changes throughout our lives according to what we do with it．”says a biologist．

1.Which of the following is true according to the first paragraph? ________．

A．Women’s brain is 10% less than men’s

B．Grey matter controls thinking in the brain．

C．Grey matter plays the same role as white matter．

D．Both sexes have the same amount of white matter．

2.What can we infer from the second and third paragraphs? ________．

A．Men do better dealing with one job at a time．

B.Women prefer doing many things at a time．

C．Women do not need to tell directions．

D．Men have weaker spatial abilities．

3.Which of the following do you agree with according to the fourth paragraph? _  A.More women take up jobs requiring speech skills

B.Young boys may be stronger than young girls．

C．Women may have stronger feelings than men．

D．Our ancestors needed more spatial skills．

4.What is the writer’s attitude in writing this passage? ________．

A．Defensive．  B．Objective．  C．Persuasive． D．Supportive．

高二英语阅读理解中等难度题查看答案及解析

If you think you’ve gained too much weight or are too skinny, you can talk to a doctor. Your doctor will tell you _1.__.

If it is concerned about your height, weight, or BMI(体重指数)，your doctor may ask questions__2.__. Your doctor may also ask about your family background to find out if you’ve received something from your parents that might make you taller, shorter, or a late bloomer(someone who develops later than other people of the same age). The doctor can then put all the information together to decide _3.__.

If your weight isn’t in a healthy range, you will probably get specific diet and exercise recommendations (推荐)based on our individual needs,. Following a doctor’s or dietitian’s plan designed especially for you will work much better than following fad(时尚) diets. For teens, fad diets or starvation plans can actually slow down growth, and the weight loss usually doesn’t last.

What _4._? Most teens who weigh less than other teens of their age are just fine. They may be going through puberty on a different schedule than kids of the same age, and their bodies may be growing and changing at a different rate. Most underweight teens catch up in weight as they finish puberty during their later teen years so there’s rarely a need to try to gain weight.

In a few cases, teenagers can be underweight because of a health problem that needs treatment. If you feel tired or ill a lot, or __5.__, or other problems that have lasted for more than a week or two, be sure to let your parents or your doctor know.

A.whether you might have a weight or growth problem

B.if you have symptoms (症状)like a cough, stomachache.

C.about your health, physical activity, and eating habits

D.if you’re worried about being too skinny

E.if you take care of it

F.whether you’re growing normally

G.about your dieting

高二英语其他题中等难度题查看答案及解析