A The number of judges will be doubled.
B Only half of the judges wilt score.
C Only some selected judges will score.
D Only half of the scores will count.
38 What does Jerry Bingham express by saying "I remain to be convinced"? A His anger. B His criticism. C His aGREement. D His doubt.
39 The attitude of those concerned in the UK to the new rules proposed by ISU can be best described as
A indifferent.
B reserved.
C enthusiastic.
D positive.
40 Which of the following is NOT true of the scoring system for diving?
A It is more biased.
B It is more reasonable.
C It is fairer.
D It is tighter.
第三篇
Eat More, Weigh Less, Live Longer
Clever genetic detective work may have found out the reason why a near-starvation diet prolongs the life of many animals.
Ronald Kahn at Harvard Medical School in Boston, US, and his colleagues have been able to extend the lifespan （寿命） of mice by 18 per cent by blocking the rodent's （啮齿动物） increase of fat in specific cells. This suggests that thinness——and not necessarily diet——promotes long life in "calorie （热量卡） restricted" animals.
"It's very cool work," says aging researcher Cynthia Kenyon of the University of California, San Francisco. "These mice eat all they want, lose weight and live longer. It's like heaven."
Calorie restriction dramatically extends the lifespan of organisms as different as worms and rodents. Whether this works in humans is still unknown partly because few people are willing to submit to such a strict diet:
But many researchers hope they will be able to trigger the same effect with a drug once they understand how less food leads to a longer life. One theory is that eating less reduces the increase of harmful things that can damage cells. But Kahn's team wondered whether the animals simply benefit by becoming thin.
To find out, they used biology tricks to di
