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 without reason for some people to（28）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 relaxation.
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 control of any person. A bath at（33）, neither hot nor cold but of（34）temperature, may be helpful to sleep. Sleeping pills should never be taken except when suggested by（35）.
第（29）题选

子曰：“回也非助我者也，于吾言无所不说。”（《先进第十一》）这是孔子对颜回不能助己的遗憾之言。 A、正确 B、...

判断题子曰：“回也非助我者也，于吾言无所不说。”（《先进第十一》）这是孔子对颜回不能助己的遗憾之言。
A、正确
B、错误

为了提高圆形截面轴心受压钢筋混凝土柱的承受能力，下列选项中能全面叙述其因素的是( )。Ⅰ.提高混凝土强度等级...

单项选择题为了提高圆形截面轴心受压钢筋混凝土柱的承受能力，下列选项中能全面叙述其因素的是( )。Ⅰ.提高混凝土强度等级；Ⅱ.减小柱子的长细比；Ⅲ.箍筋形式改为螺旋式箍筋；Ⅳ.箍筋加密

The ordinary family in colonial North America was prima...

单项选择题The ordinary family in colonial North America was primarily concerned with sheer physical survival and beyond that, is own economic prosperity. Thus, children were valued in terms of their productivity, and they assumed the role of producer quite early. Until they fulfilled this role, their position in the structure of the family was one of subordination ( 从属), and their psychological needs and capacities received little consideration.
As the society became more complex, the status of children in the family and in the society became more important. In the complex, technological society that the United States has become,each member must fulfill a number of personal and occupational roles and be in constant contact with a great many other members. Consequently, viewing children as potentially acceptable members of society means that they are regarded more as people in their own right than as utilitarian organisms.
This acceptance of children as equal participants in the contemporary family is reflected in the variety of statutes protecting the rights of children and in the social public welfare programs devoted exclusively to their well-being.
This new way of children and the increasing contact between the members of society has also resulted in a great interest in child-rearing techniques. People today spend a considerable portion of their time on the proper way to bring up children. It is now possible to influence the details of the socialization of another person′ s child by spreading the principle of current and fashionable theories and methods of child-rearing.
It can be inferred from the passage that formal schooling in colonial North America was .