More sleep in old age is __________ with better health, and most older people would feel better and more alert if they slept for longer periods.

单选题

More sleep in old age is __________ with better health, and most older people would feel better and more alert if they slept for longer periods.

答案解析

材料题

Enough sleep is important to health. The amount of sleep（21）depends on the age of the per-son and the conditions in which sleep（22）. The young may need more sleep than the old, but generally eight hours are enough for the health of grown-ups. Some can（23）with less than this amount but（24）may need more. Every person knows his own need. It is then a matter of how to（25）it. Sleep should always be enough to make one relaxed(松弛)and ready for（26）work. Fresh air is（ 27）to sound sleep(酣睡). It is not wit

答案解析

单选题

You would imagine that sleeping was a quiet and peaceful experience but in reality，our brains are more active during some stages of sleep than when we are______。

答案解析

单选题

The purpose of non‐REM sleep is even more mysterious.The new experiments,such as those（ ）for the first time at a recent meeting or the society for Sleep Research in Minneapolis,suggest fascinating explanations for the purpose of non REM sleep.

答案解析

材料题

nic shortages of sleep一for instance,one report demonstrated that people who habitually sleep less than 7 hours each night have a higher risk of dying within a fixed period than people who sleep more.5 For the current report,Kripke reviewed the responses of 1,004 adults to sleep questionaires,in which participants indicated how much they slept during the week and whether they experienced any sleep problems.Sleep problems included waking in the middle of the night,arising early in the morning and

答案解析