Although Zhang Ziyi is international film star, she manages to achieve balance between her career and family. A. the; a; B. an; a C. 不填,a D. an; 不填题目和参考答案——青夏教育精英家教网—

My Experience in a Free School

At first I couldn't believe it! There were no __26 in rows; no bells rang; no one had to go to __27 . Although we all lived “in”, __28 made us go to bed at a certain time; there was no “lights out”.

The __29 thing was that practically all the students went to class, __30 very few people stayed up late at night. Only the new people stayed up or _31 class. The new ones always went wild __32 , but this never lasted long. The __33 took some getting used to. Our teachers treated us like_34 ; never did we have to __35 “stand up”,“sit down”,“speak out”. I don't __36 one student who didn't try his best.

The subjects were the same as those in __37 school, but what a difference in the approach(方式)! For example, in botany(植物学) we had __38 classes in the spring or fall, but instead we __39 [ZZ(Z)39two gardens, a vegetable garden and a flower garden. __40 in winter we each studied a few __41 things about what we had grown. In math the students built three different kinds of storerooms small ones __42 ,but usable. They did this instead of having lessons in the classroom. They really had a __43 time too, designing everything, drawing the blueprints, __44 the angles(角度) and so on. I didn't take __45 .I can't stand it! Besides, I could do the basic things with numbers. That's __46 !

__47 I think I am a __48 person for having gone to the school. I can read and write as well as anyone else my age, and I can think better. That's probably a real big __49 between the free school and regular school—the amount of __50.

26.A. desks B. lights C. students D. buildings

27.A. home B. bed C. class D. work

28.A. anybody B. nobody C. teachers D. parents

29.A. sad B. last C. good D. strange

30.A. and B. but C. so D. yet

31.A. attended B. took C. missed D. studied

32.A. from then on B. at first C. once more D. just then

33.A. freedom B. habit C. time D. people

34.A. workers B. pupils C. gardeners D. grown?ups

35.A. understand B. study C. play D. say

36.A. hear from B. feel like C. think about D. know of

37.A. night B. regular C. small D. real

38.A. all B. short C. no D. indoor

39.A. planted B. studied C. drew D. toured

40.A. Still B. Then C. Yet D. Next

41.A. wild B. successful C. usual D. particular

42.A. as well B. after a while C. of course D. as a result

43.A. funny B. great C. convenient D. thoughtful

44.A. looking out B. taking out C. finding out D. figuring out

45.A. math B. care C. botany D. notice

46.A. dull B. interesting C. enough D. dangerous

47.A. On the whole B. Once again C. Sooner or later D. After a while

48.A. careful B. better C. busier D. lovely

49.A. problem B. chance C. difference D. change

50.A. reading B. gardening C. teaching D. thinking

The term “multitasking” originally referred to a computer's ability to carry out several tasks at one time. For many people, multitasking has become a way of life and even a key to success. In fact, some excellent mental aerobic exercises (大脑训练) involve engaging the brain in two or more challenging activities at a time. Although checking e-mail while talking on a phone and reading the newspaper may be second nature for some people, many times multitasking can make us less productive, rather than more. And studies show that too much multitasking can lead to increased stress, anxiety and memory loss.

In order to multitask, the brain uses an area known as the prefrontal cortex (前额叶脑皮层). Brain scans of volunteers performing multiple tasks together show that as they shift from task to task, this front part of the brain actually takes a moment of rest between tasks. You may have experienced a prefrontal cortex “moment of rest” yourself if you've ever dialed (拨电话) a phone number and suddenly forgotten who you called when the line is answered. What probably occurred is that between the dialing and the answering, your mind shifted to another thought or task, and then took that “moment” to come back. Research has also shown that for many volunteers, job efficiency (效率) declines while multitasking, as compared to when they perform only one task at a time.

Multitasking is easiest when at least one of the tasks is habitual, or requires little thought. Most people don' t find it difficult to eat and read the newspaper at the same time. However, when two or more attention-requiring tasks are attempted at one time, people sometimes make mistakes.

We often don't remember things as well when we're trying to manage several details at the same time. Without mental focus, we may not pay enough attention to new information coming in, so it never makes it into our memory stores. That is one of the main reasons we forget people's names—even sometimes right after they have introduced themselves. Multitasking can also affect our relationships. If someone checks their e-mail while on the phone with a friend, they may come off as absent-minded or disinterested. It can also cause that person to miss or overlook key information being passed on to them.

1. Why are some mental aerobic exercises designed to engage people in multitasking?

A. To make them more productive.

B. To reduce their stress and anxiety.

C. To develop their communication Skills.

D. To help them perform daily tasks more easily.

2. According to Paragraph 2, why may a person suddenly forget who he has called?

A. He may have his prefrontal cortex temporarily damaged.

B. He is probably interrupted by another task.

C. He is probably not very familiar with the person he has called.

D. He may need a rest between dialing and speaking.

3. People tend to make mistakes when .

A. they perform several challenging tasks at a time

B. new messages are processed one after another

C. their relationships with others are affected

D. the tasks require little thought

4. What is the main idea of the passage?

A. Multitasking has become a way of life.

B. Multitasking often leads to efficiency decline.

C. Multitasking exercises need to be improved.

D. Multitasking enables people to remember things better.[来源:Z#xx#k.Com]

Batteries can power anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri(MU) researchers are developing a nuclear energy source that is smaller, lighter and more efficient.

“To provide enough power, we need certain methods with high energy density(密度)”，said Jae Kwon, assistant professor of electrical and computer engineering at MU. “The radioisotope(放射性同位素) battery can provide power density that is much higher than chemical batteries.”

Kwon and his research team have been working on building a small nuclear battery, presently the size and thickness of a penny, intended to power various micro / nanoelectromechanical systems (M/NEMS). Although nuclear batteries can cause concerns, Kwon said they are safe.

“People hear the word ‘nuclear’ and think of something very dangerous,” he said, “However, nuclear power sources have already been safely powering a variety of devices, such as pace-makers, space satellites and underwater systems.”

His new idea is not only in the battery’s size, but also in its semiconductor(半导体). Kwon’s battery uses a liquid semiconductor rather than a solid semiconductor.

“The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure(晶体结构) of the solid semiconductor,” Kwon said, “By using a liquid semiconductor, we believe we can minimize that problem.”

Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwon is working to build and test the battery. In the future, they hope to increase the battery’s power, shrink its size and try with various other materials. Kwon said that battery could be thinner than the thickness of human hair.

1. Which of the following is true of Jae Kwon?

A. He teaches chemistry at MU.

B. He developed a chemical battery.

C. He is working on a nuclear energy source.

D. He made a breakthrough in computer engineering.

2. Jae Kwon gave examples in Paragraph 4_________.

A. to show chemical batteries are widely applied.

B. to introduce nuclear batteries can be safely used.[来源:Z.xx.k.Com]

C. to describe a nuclear-powered system.

D. to introduce various energy sources.

3. Liquid semiconductor is used to _________.

A. get rid of the radioactive waste

B. test the power of nuclear batteries.

C. decrease the size of nuclear batteries

D. reduce the damage to lattice structure.

4. According to Jae Kwon, his nuclear battery _______.

A. uses a solid semiconductor

B. will soon replace the present ones.

C. could be extremely thin

D. has passed the final test.

5. The text is most probably a ________.

A. science news report B. book review

C. newspaper ad D. science fiction story

Batteries can power anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri(MU) researchers are developing a nuclear energy source that is smaller, lighter and more efficient.

“To provide enough power, we need certain methods with high energy density(密度)”，said Jae Kwon, assistant professor of electrical and computer engineering at MU. “The radioisotope(放射性同位素) battery can provide power density that is much higher than chemical batteries.”

Kwon and his research team have been working on building a small nuclear battery, presently the size and thickness of a penny, intended to power various micro / nanoelectromechanical systems (M/NEMS). Although nuclear batteries can cause concerns, Kwon said they are safe.

“People hear the word ‘nuclear’ and think of something very dangerous,” he said, “However, nuclear power sources have already been safely powering a variety of devices, such as pace-makers, space satellites and underwater systems.”

His new idea is not only in the battery’s size, but also in its semiconductor(半导体). Kwon’s battery uses a liquid semiconductor rather than a solid semiconductor.

“The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure(晶体结构) of the solid semiconductor,” Kwon said, “By using a liquid semiconductor, we believe we can minimize that problem.”

Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwon is working to build and test the battery. In the future, they hope to increase the battery’s power, shrink its size and try with various other materials. Kwon said that battery could be thinner than the thickness of human hair.

1. Which of the following is true of Jae Kwon?

A. He teaches chemistry at MU.

B. He developed a chemical battery.

C. He is working on a nuclear energy source.

D. He made a breakthrough in computer engineering.

2. Jae Kwon gave examples in Paragraph 4_________.

A. to show chemical batteries are widely applied.

B. to introduce nuclear batteries can be safely used.[来源:Z.xx.k.Com]

C. to describe a nuclear-powered system.

D. to introduce various energy sources.

3. Liquid semiconductor is used to _________.

A. get rid of the radioactive waste

B. test the power of nuclear batteries.

C. decrease the size of nuclear batteries

D. reduce the damage to lattice structure.

4. According to Jae Kwon, his nuclear battery _______.

A. uses a solid semiconductor

B. will soon replace the present ones.

C. could be extremely thin

D. has passed the final test.

5. The text is most probably a ________.

A. science news report B. book review

C. newspaper ad D. science fiction story

根据对话内容，从对话后的选项中选出能填入空白处的最佳选项，并将答案标号填写在本题下面相应题号后的横线上。选项中有两项多余选项。（共5小题；每小题2分，满分10分）

（Zhang=Z Mr. Smith=M）

Z: Hello, are you Mr. Smith from the United States?

M: Yes, Robert Smith. Please call me Robert.__ 1___.

Z: My pleasure. Welcome to China. My name is Zhang Lin. You can call me Lin. This is my card.

M: Thank you. And __2___.

Z: Oh, good, thanks. How was the journey?

M: __3___, although a little tiring..

Z: Then let’s get your things and go to the hotel now.

M: Oh, thank you. __4___?

Z: It’s about thirty minutes’ drive. By the way, we are going to have a dinner party for you this evening.

M: It’s very kind of you. __5___?

Z: Six thirty. I’ll pick you up at six o’clock.

M: Ok, see you then.

Z: Bye.

A. It was OK

B. Where is the hotel

C. Here is my card

D. Where shall we go

E. Thank you for meeting me

F. How many people are going there

G. What time does it begin

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