According to the researchers, teenage mothers tend to have less bright children because . A. the——青夏教育精英家教网—

According to the researchers, teenage mothers tend to have less bright children because . A. they aren’t so good at childcare B. they usually have less fat than mature women C. they aren’t physically strong enough D. their waist and hip measurements differ less D United States President George W. Bush is expected to issue a directive in the next few weeks. It will give the US Air Force a green light for the development of space weapons, US media reported last week. This would potentially start a new global arms race, some experts have warned. To keep that from happening, last Wednesday the White House explained that it was not considering putting weapons in space. It said it was making a shift in US space policy to allow for protection of satellites. But some defense analysts and arms control advocates argue that the policy will pave the way for the US to put both defensive and offensiveweapons in space. “No one should be fooled, said Theresa Hitchens, an American weapons expert. The US is now restricted by a 1996 directive signed by President Bill Clinton. Plans for space weapons were vetoedby the Clinton cabinet. The directive emphasized the peaceful use of space , in agreement with almost unanimousglobal opinion. The US military has placed importance on space and has sent up numerous satellites for troop communications and to provide intelligence and data to guide bombs to their targets. The US Air Force wants to develop space- based weapons that could strike targets anywhere in the world within 90 minutes of receiving the order to open fire. These new weapons under development cover a wide range. They include hunter- killer satellites and orbiting weapons. And they use lasers, radio waves, or even dense metal tubes, known as “Rods from God , dropped from space to do the damage. There are many barriers to the setting up of this kind of program, experts say. First is the coast. It is estimated that the budget may be US $220 billion to US $ 1 trillion. The technical difficulties of developing reliable space weapons are also a problem. And, the program will draw strong criticism from around the world. Experts worry about starting a space arms race. 【查看更多】

Women with an hourglass figure have brains to go with their curves (曲线), scientists claim. Going in at the waist is said to be a sign of intelligence which leads to brighter children, too. Women such as Nigella Lawson with a big difference between their waist and hip measurements scored singificantly better in tests than those with thinner, straighter frames. Researchers concluded that it was not necessary for a woman to be skinny―what mattered is that her waist should be smaller than her hips. A ratio of 3:5 was found to be ideal.

The study, by the Universities of Pittsburgh and Califrnia, involved 16,000 women and girls.

According to the scientists, the results are no mere quirk of nature. They claim that the fat around curvy hips and thighs (大腿) holds higher levels of -3 fatty acids which are essential for the growth of the brain during pregnancy(怀孕). The fat which collects around the waist, however, is more likely to contain -6 fatty acids, which are less suited to brain growth.

Reporting in the journal Evolution an Human Behaviour, the researchers found that the children of curvy mothers are more likely to do well in cognitive tests than others. They claim that this could help explain why the children of teenage mothers―who might not yet be physically mature enough to have developed real curves―tend to do less well in school.

As well as boosting (提升) brainpower, －3 fatty acids found in oily fish are considered to be of huge health benefit.

Althoug the study analysed women’s bodies only, －3 fatty acids are also stored in men’s hips. However, it is not known whether men with wide hips benefit from the same brainpower boost.

72．Which shows the possible shape of an hourglass?

A. B. C. D.

73．Suppose the following measurements are taken from four women. Which of them is more likely to have bright children?

A. Waist：60cm；Hip：100cm B. Waist：60cm；Hip：80cm

C. Waist：55cm；Hip：60cm D. Waist：120cm；Hip：110cm

74．The underlined sentence“the results are no mere quirk of nature”possibly

tells us the results .

A. can be explained scientifically B. are strange and hard to explain

C. have just come about by chance D. are very interesting

75．According to the researchers, teenage mothers tend to have less bright children because .

A. they aren’t so good at childcare

B. they usually have less fat than mature women

C. they aren’t physically strong enough

D. their waist and hip measurements differ less

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Women with an hour glass figure have brains to go with their curves(曲线)，scientists claim.

Going in at the waist is said to be a sign of intelligence which leads to brighter children, too,Wonmen such as Nigella Lawson with a big difference between thir waist and hip measurements scored significantly better in tests than those with thinner,straighter frames,, Researchers concluded that it was not necessary for a woman to be skinny-what mattered was that her waist should be smaller than her hips, A ratio of 3:5 was found to be idea,

The study ,by the Universities of Pittsdburgh and California,involved 16,000 women and girls,

According to the scientists，the results are no mere quirk of nature．They claim that the fat

Around culvy hips and thighs(大腿)holds higher levels of-3 fatty acids which are essential for

the growth of the brain during pregnancy．The fat which collects around the waist，howover．is

more likely to contain-6 fatty acids，which areless suited to brain growth．

Reporting in the joumal Evolution and Human Behaviour，the researchers found that the children of curvy mothers are more likely to do well in cognitive tests than others．they claim that this could help explain why the children of teenage mothers．who might not yet be physically mature enough to have developed real curves-tend to do less well in school．

As wel las boosting(提升)brainpower,一3 fatty acids found in oily fish arc considered to be of huge health benefit Although the study analysed women’s bodies only,一3 fatty acids are also stored in men’s hips ,However it is not known whether men with wide hips benefit from the same brain power boost,．

72.Which shows the possible shape of an hour glass?

73．Suppose the following measurements are taken from four women．Which of them is more likely to have bright children?

A. Waist：60cm；Hip：100 cm B．Waist：60cm：Hip：80cm

C. Waist：55 cm；Hip 1 60cm D．Waist：120cm；Hip：110cm

74.The underlined sentence‘'the results are nomere quirkofnature，'possible tells us the results

A. can be explained scientifically B are strange and hard to explain

C. have just come about by chance D are very interesting

75．According to the researchers，teenage mothers tend to have less bright children because

A．they aren’t so good at child care

B．they usually have less fat than mature women

C．they area’t physically strong enough

D．their waist and hip measurements differ less