题目内容

In the beauty competition, women are asked_______ some of the exercises ________ the music.

A. performing to; to B. performing; with

C. to perform; to D. to perform; by

C

【解析】

试题分析:考查动词和介词的用法。sb be asked to do sth.某人被要求做某事;to表示"到..."或者“于...";with表示“和,与”的意思,by表示“被”或者“使用”的意思。句意:妇女们被要求按音乐表演体操。to the music中to表示:附和,随着。故选C。

考点:考查动词和介词的用法。

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Teenagers are often a difficult group. With all those hormones(荷尔蒙) flooding their bodies, they can be moody, unpredictable, and tend to make uncertain choices. But however confusing their teenage years are, kids can still be generally happy, depending on their lifestyle choices. According to a new research by British scientists, teens who don’t smoke, drink only moderately or not at all, and who don’t eat much junk food are likely to be happier than other teens.

The study looked at 40,000 British families and came up with some interesting findings. For example, kids who never drank alcohol were up to six times more likely to report higher levels of happiness than kids who drank. And teens who smoked were five times less likely to rate high on happiness charts compared to kids who don’t smoke. Same goes for diet and physical activity. The more fruits and vegetables kids eat, and the more hours they spend playing sports, the happier they are.

Now, of course this doesn’t mean that not smoking or drinking, and playing sports guarantees happiness. It could be that kids who have happy character tend to be more active and less addicted to drinking or smoking. And it could equally be the case that kids who are unhappy are more related to drinking and smoking and eating junk food.

Other studies have shown that exercise is a proven way to treat anxiety and depression. Future studies may support the idea that other healthful behaviors, including refraining(克制) from smoking, drinking, and eating too much junk, can avoid sadness and increase happiness, too.

1.What can we learn from the text?

A. Not smoking or drinking guarantees happiness.

B. Teens with flooding hormones can not be happy.

C. Playing sports can decrease teen’s unhappiness.

D. Unhappiness can certainly result in smoking and drinking.

2. Which of the following might help teens quit anxiety?

A. Smoking and drinking.

B. Taking exercise.

C. Eating junk food.

D. Going on a diet.

3.Which can be the best title for the text?

A. Ways to treat anxiety and depression.

B. Exercise and teenagers’ health.

C. Teenagers shouldn’t drink or smoke.

D. Teenagers’ lifestyle and their happiness.

You never see him, but they're with you every time you fly. They record where you are going,how fast you're traveling and whether everything on your airplane is functioning normally. Their ability to withstand almost any disaster makes them seem like something out of a comic book.They're known as the black box.

When planes fall from the sky, as a Yemeni airliner did on its way to Comoros Islands in the India ocean June 30, 2009, the black box is the best bet for identifying what went wrong. So when a French submarine (潜水艇) detected the device's homing signal five days later, the discovery marked a huge step toward determining the cause of a tragedy in which 152 passengers were killed.

In 1958, Australian scientist David Warren developed a flight-memory recorder that would track basic information like altitude and direction. That was the first mode for a black box, which became a requirement on all U.S. commercial flights by 1960. Early models often failed to withstand crashes, however, so in 1965 the device(装置) was completely redesigned and moved to the rear of the plane – the area least subject to impact – from its original position in the landing wells (起落架舱). The same year, the Federal Aviation Authority required that the boxes, which were never actually black, be painted orange or yellow to aid visibility.

Modern airplanes have two black boxes: a voice recorder, which tracks pilots' conversations,and a flight-data recorder, which monitors fuel levels, engine noises and other operating functions that help investigators reconstruct the aircraft's final moments. Placed in an insulated ( 隔绝的) case and surrounded by a quarter-inch-thick panels of stainless steel, the boxes can withstand massive force and temperatures up to 2,000℉. When submerged, they're also able to emit signals from depths of 20,000 ft. Experts believe the boxes from Air France Flight 447, which crashed near Brazil on June 1,2009, are in water nearly that deep, but statistics say they're still likely to turn up. In the approximately 20 deep-sea crashes over the past 30 years, only one plane's black boxes were never recovered.

1.In Paragraph 1,the author wants to say the black box_________.

A. is an necessary device on an airplane

B. comes from a comic book

C. can prevent disasters

D. can control the function of an airplane

2.From the black box on the Yemeni airliner_________could be found.

A. the scene of the crash and the degree of the damage

B. the total number of passengers on board

C. data for analyzing the cause of the crash

D. homing signals sent by the pilot before the crash

3.Why was the black box redesigned in 1965?

A. New materials became available by that time.

B. The early models often got damaged in the crash.

C. Too much space was needed for its device.

D. The early models didn't provide the needed data.

4.The black boxes were painted orange or yellow to_________.

A. distinguish them from the colour of the plane.

B. warn people to handle them with care

C. make them easily identified.

D. obey the international standards.

5.What do we know about the black boxes from Air France Flight 447?

A. There is still a good chance of their being recovered.

B. There is an urgent need for them to be reconstructed.

C. They have stopped sending homing signals.

D.They were destroyed somewhere near Brazil.

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