阅读理解 African women who carry heavy loads on their .heads use much less energy per pound of load than soldiers who carry the same weight on their backs. In fact , according to a team of Kenyan, Italia 题目和参考答案——青夏教育精英家教网—

阅读理解

　　African women who carry heavy loads on their .heads use much less energy per pound of load than soldiers who carry the same weight on their backs. In fact , according to a team of Kenyan, Italian and U. S. researchers, these women can carry up to 20 percent of their body weight without costing any extra energy. Carrying a 70-percent load, the women raised their energy consumption (消耗) only about 50 percent while nearly 100 percent for soldiers.

　　The scientists said they could not explain the finding for certain. One speculation (推测) is that head-supported loads are moved less up-and-down or side-to-side with each step than back-or-shoulder supported loads. But experience also seems to be a factor (因素) , since people who are not used to head carrying use as much energy that way as they do hack-carrying.

1．What's the main idea of the passage?

[　　]

A．African women carry the heaviest loads in the world.

B．Head-supported loads costs less energy.

C．The best way of carrying loads.

D．Use your heads.

2．According to the passage, if an American woman carries a load of her body weight , how much energy consumption will she raise?

[　　]

A．20 percent.

B．50 percent.

C．80 percent.

D．100 percent.

3．We can draw a conclusion from the passage that ________.

[　　]

A．African men also carry things on their heads

B．African women began to practise carrying things on their heads from young

C．Any one who carries loads on his head will save some energy

D．If a load is fixed on one's back, he can save 20 percent of his energy

4．Which of the following is true according to the passage?

[　　]

A．An African woman can carry more loads than a soldier.

B．There is no exact explanation about the matter up to now.

C．The team of research group is made up of some Italian and U. S. scientists and also some Kenyan women.

D．We should form the habit of carrying thing on our heads.

答案：B;C;B;B

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