摘要:By the time I got home last night . My parents to the cinema. A.have gone B.had gone C.has gone

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What are the limits(极限) of human body? The BBC’s Focus magazine has some answers.

How cold can you stand?

Normal body temperature is around 37℃. At 35℃ you’re unable to write your name. Even walking is very difficult. At 33℃ you may find it difficult to think, understand and form(形成) opinions properly. By the time you have cooled to 20℃, your heart would have stopped beating.

Limit: 0℃. Ice would form in your tissues(纤维组织), killing all the cells.

How spicy can you eat?

There is capsaicin(辣椒素) in many foods. The more capsaicin, the hotter the dishes are. If you’re healthy enough, you can survive(存活) eating a teaspoon of pure capsaicin. But you would find it impossible to eat anything else for a few hours.

Limit: 5g capsaicin.

How fast can you run?

The fastest man in the world is Asafa Powell. The runner finished the 100m in 9. 74 seconds in 2007. This gives an average(平均的) speed of 36. 96km/h.

Top runners are at their fastest around 80 metres, so a runner’s greatest speed may reach 43.06km/h.

Limit: 43.06km/h.

How loud is too loud?

The loudest sound you can hear is 168 dB(分贝). Sound louder than that may do harm to your ears. The loudest sound ever recorded was the eruption of Krakatoa(卡拉卡托火山爆发) in 1883. It was 180 dB, 160km away.

Limit: 168 dB

根据短文内容,回答问题

1.At what temperature will your cells die?

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2. What will happen if you eat a teaspoon of pure capsaicin?

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3. How fast can a runner run at most?

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4. What sound can be heard by your ears?

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5. Where can you read such an article?

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C)根据对话内容,从下面方框中选择适当的单词或词组填空,使对话内容完整正确,并将答案填写相应位置上。

 

By the time he was 13 years old, a rare disease had taken away Erik Weihenmayer’s eyesight. Although he lost his eyesight, he did not lose his 1.  . On May 25th, 2001, the 32-year-old man became the first blind person to climb the world’s2.   mountain. Erick is not only a world-class mountain climber but also a good skier and skydiver. He3. long-distance cycle races and run several marathons. He hopes to become one of the youngest people to climb all of the “Seven Summits”, the highest mountains on each of the world’s seven continents. 4.   the best thing he has done, 5. , is showing the world that it is possible to overcome even the greatest difficulties.

 

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