But Spindler isn’t sure the trade-off is worth it． “The mice get less disease，they live longer．but they’re hungry,”he says．“Even seeing what a diet does，it’s still hard to go to a restaurant and say：‘I can only eat half of that’．’’
Spindler hopes we soon won’t need to diet at a11．His company，Life Span Genetics in California，is looking for drugs that have the effects of calorie restriction．
練習(xí)：
1.According to the passage，which of the following is NOT true?
A)Eating less than usual might make us live longer．
B)If we go on a diet when old，we may keep healthy．
C)Dieting might not be needed．
D)We have to begin dieting from childhood．
2.Why does the author mention an elderly mouse in paragraph 2?
A)To describe the influence of old age on mice．
B)To illustrate the effect of meager food on mice．
C)To tell US how mice’s liver genes behave．
D)To inform US of the process of metabolizing drugs．
3.What can be inferred about completely normally fed mice mentioned in the passage?
A)They will not experience free radical production．
B)They will experience more genetic rejuvenation in their lifetime．
C)They have more old liver genes to behave like young genes．
D)They are more likely to suffer from inflammation．
4.According to the author，which of the following most interested the researchers?
A) The mice that started dieting in old age．
B)27 of those 46 old genes that continued to behave like young genes．
C)Calorie restriction that works in people．
D)Dieting that makes sure a drug is effective．
5.According to the last two paragraphs，Spindler believes that
A)calorie restriction is very important to young people．
B)seeing the effect of a diet，people．will eat less than normal．
C)dieting is not a good method to give US health and a long life．
D)drugs do not have the effects of calorie restriction．
答案及解析：
1．文章標(biāo)題分析：Eat to Live
1． A meager （不足的）diet may give you health and long 1ife，but it’s not much fun—and it might not even be necessary．We may be able to hang on to most of that youthful vigor even if we don，t start to diet until old age
Spindler hopes we soon won’t need to diet at a11．His company，Life Span Genetics in California，is looking for drugs that have the effects of calorie restriction．
練習(xí)：
1.According to the passage，which of the following is NOT true?
A)Eating less than usual might make us live longer．
B)If we go on a diet when old，we may keep healthy．
C)Dieting might not be needed．
D)We have to begin dieting from childhood．
2.Why does the author mention an elderly mouse in paragraph 2?
A)To describe the influence of old age on mice．
B)To illustrate the effect of meager food on mice．
C)To tell US how mice’s liver genes behave．
D)To inform US of the process of metabolizing drugs．
3.What can be inferred about completely normally fed mice mentioned in the passage?
A)They will not experience free radical production．
B)They will experience more genetic rejuvenation in their lifetime．
C)They have more old liver genes to behave like young genes．
D)They are more likely to suffer from inflammation．
4.According to the author，which of the following most interested the researchers?
A) The mice that started dieting in old age．
B)27 of those 46 old genes that continued to behave like young genes．
C)Calorie restriction that works in people．
D)Dieting that makes sure a drug is effective．
5.According to the last two paragraphs，Spindler believes that
A)calorie restriction is very important to young people．
B)seeing the effect of a diet，people．will eat less than normal．
C)dieting is not a good method to give US health and a long life．
D)drugs do not have the effects of calorie restriction．
答案及解析：
1．文章標(biāo)題分析：Eat to Live
1． A meager （不足的）diet may give you health and long 1ife，but it’s not much fun—and it might not even be necessary．We may be able to hang on to most of that youthful vigor even if we don，t start to diet until old age