2 Other people feel sure that the present trend is towards too little sleep. To quote one medical opinion, "Thousands of people drift through life suffering from the effects of too little sleep;the reason is not that they can't sleep." Like advancing colonists, we do seem to be grasping ever more of the land of sleep for our waking needs, pushing the boundary back and reaching, apparently, for a point in our evolution where we will sleep no more. This in itself, of course, need not be a bad thing. What could be disastrous, however, is that we should press too quickly towards this goal, sacrificing sleep only to gain more time in which to jeopardize our civilization by actions and decisions made weak by fatigue.
3 Then, to complete the picture, there are those who believe that most people are persuaded to sleep too much. Dr H. Roberts, writing in Every Man in Health, asserts:"It may safely be stated that, just as the majority eat too much, so the majority sleep too much. "One can see the point of this also. It would be a pity to retard our development by holding back those people who are gifted enough to work and play well with less than the average amount of sleep, if indeed it does them no harm. If one of the trends of evolution is that more of the life span is to be spent in gainful waking activity, then surely these people are in the van of this advance.
The author seems to indicate that______.
A.there are many controversial issues like the right amount of sleep.
B.among many issues the right amount of sleep is the least controversial.
C.people are now moving towards solving many controversial issues.
D.the right amount of sleep is a topic of much controversy among doctors.
第1题
有机磷农药在体内的主要转化方式
A.氧化、结合
B.水解、结合
C.硫化、结合
D.氧化、水解、结合
E.氧化和水解
第2题
有机磷农药在体内的主要转化方式有
A、氧化、结合
B、水解、结合
C、硫化、结合
D、氧化、水解、结合
E、氧化、水解
第7题
一般情况下,有机磷农药在体内的转化主要有氧化和水解两种方式,其结果分别是()。
A.氧化使毒作用增强,水解使毒作用降低
B.氧化、水解均使毒作用增强
C.氧化、水解均使毒作用降低
D.氧化、水解均不改变毒作用大小
E.氧化使毒作用降低,水解使毒作用增强
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