Enough sleep is important to health. The amount of sleep 21 depends on the age of the person and the conditions in which sleep 22 . The young may need more sleep than the old, but 23 eight hours is enough for the health of grown-ups. Some can do 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 be always enough to make one relaxed (松弛) and ready for 26 work.
Fresh air is 27 to sound sleep(酣睡).It is not 28 reason for some people to insist that it is practical to sleep in the open air. 29 a person can keep himself warm, out of-door sleeping probably gives the body 30 complete relaxtion.
Ability to sleep is largely a habit. The conditions referred to only lead to sleep. Out-of-door 31 , a good habit of regular drinking and the avoidance of late eating and 32 are all helpful to sound sleep. Such factors are largely within the 33 of any person. A bath at 34 , neither hot nor cold but of body temperature, may be helpful to sleep. Sleeping pills should never be taken except when suggested by 35 .
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一些人认为在户外睡觉有助于睡眠是不无道理的。
我国独立自主的外交政策体现在哪些方面？我国为什么必须实行对外开放？
简述人民民主专政理论的基本内容。
简述走农村包围城市，武装夺取政权道路的必要性。
简述实践及其对认识的决定作用。
遵义会议集中解决了党的政治路线问题。
生产方式是社会发展的决定力量。
对外开放是我国的一项长期的基本国策，实行这一国策的前提和基础是（ ）
计划和市场是（ ）
加强党的自身建设，必须放在首位的是（ ）
中国共产党的立党之本、执政之基、力量之源是（ ）
