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Paper produced every year is the world’s production of vehicles.

A. the three weight of

B. three times the weight of

C. as three times heavy as

D. three times as heavier as

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Anyone who has worn a cast (石膏) knows that rebuilding muscle strength once the cast is removed can be difficult. Now researchers at the Ohio Musculoskeletal and Neurological Institute (OMNI) at Ohio University have found that the mind is critical in maintaining muscle strength following a long period of not moving and that mental imagination may be key in reducing the associated muscle loss.

Strength is controlled by a number of factors---the most studied by far is skeletal muscle. However, the nervous system is also an important, though not fully understood, determining factor of strength and weakness.

Brian C. Clark and colleagues set out to test how the system functions in strength development. They designed an experiment to measure changes in wrist (腕) muscle strength in three groups of healthy adults. Twenty-nine subjects wore a hard cast that extended from just below the elbow (肘) past the fingers, effectively preventing the hand and wrist from moving, for four weeks. Fifteen subjects who did not wear casts served as the control group.

Of the 29 people wearing a hard cast, half were asked to regularly perform an exercise, imagining they were strongly contracting their wrist for five seconds and then resting for five seconds. This was repeated four times in a row followed by a one-minute break for a total of 13 rounds per session and five sessions per week. The other half performed no imagination exercises.

At the end of the four-week experiment, both groups who wore casts had lost strength in their unmoving limbs (肢体) when compared to the control group. But the group that performed imagination exercises lost 50% less strength than the non-imagination group. The nervous system’s ability to fully make the muscle recover also returned more quickly in the imagination group compared to the non-imagination group.

1.What does the underlined word “critical” mean in the first paragraph?

A. Serious. B. Embarrassing.

C. Important. D. Normal.

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

A. Scientists have partly understood the nervous system.

B. Whoever has worn a cast for long may have difficulty in muscle recovery.

C. Scientists have already spent a lot of time in studying skeletal muscle.

D. The number of the subjects in the experiment was 29 in all.

3.What can we learn from the experiment?

A. The control group lost 50% less strength than the non-imagination group.

B. The imagination group lost more strength than the non-imagination group.

C. The control group wore casts but didn’t perform the imagination exercise.

D. The speed of non-imagination group’s muscle recovery was slower.

4. Where can you most probably find the passage?

A. In a science magazine. B. In a storybook.

C. In a textbook . D. In a book review.

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阅读下面短文,掌握其大意,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。

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2.A. Though B. After C. Or D. So

3.A. agriculture B. literature C. transport D. medicine

4.A. view B. form C. database D. knowledge

5.A. principles B. methods C. paintings D. computers

6.A. respect B. protect C. provide D. change

7.A. command B. guidance C. control D. pressure

8.A. simple B. busy C. normal D. happy

9.A. courage B. energy C. place D. time

10.A. habit B. project C. business D. design

11.A. a lot less B. a lot more C. some notes D. some risks

12.A. weak B. nervous C. tired D. old

13.A. privately B. quietly C. quickly D. closely

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17.A. but B. before C. if D. and

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When visiting New York City with your kids,there are many things to do with kids that will entertain their spirits and feed their minds.

The Whispering Gallery

Make your way to the Whispering Gallery. The Whispering Room's architecture allows for a phenomenon that usually makes people laugh. Once inside the gallery,place one person facing the corner at one end of the room and then place another person facing the corner at the opposite end. Ask one of the participants to whisper a phrase or a quick sentence or two and the person on the opposite end will be able to hear every word that was said.

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The American Museum of Natural History

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the Scholastic Store

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212一956一5151

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完形填空

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It has been many years since I made my first garden out of my desire to ________ my parents. Today I become known as Mrs. Greenthumbs, teaching gardening and hosting a gardening show, which makes my parents feel very ________ . And now I could say it is my affection for ________ that makes me a real gardener.

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2.A. pleaseB. changeC. annoyD. help

3.A. excitementB. appreciationC. surpriseD. doubt

4.A. clean upB. care aboutC. collect upD. come in

5.A. equalB. similarC. oppositeD. superior

6.A. painfulB. upsettingC. valuableD. interesting

7.A. hold onB. break outC. come upD. get through

8.A. toB. byC. inD. with

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10.A. InsteadB. BesidesC. ThereforeD. However

11.A. shoutedB. laughedC. glancedD. jumped

12.A. troublesomeB. convenientC. enjoyableD. dangerous

13.A. sadnessB. displeasureC. delightD. relief

14.A. other thanB. more thanC. rather thanD. less than

15.A. dislikeB. encouragementC. threatD. suggestion

16.A. decidedB. stoppedC. continuedD. struggled

17.A. respondB. turnC. devoteD. lead

18.A. defeatB. satisfyC. respectD. challenge

19.A. comfortableB. proudC. strangeD. disappointed

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