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单项选择题

已知主视图和俯视图，正确的左视图是（  ）

A．
B．
C．
D．
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单项选择题
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,hut（23）eight hours are 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 relaxation.
Ability to sleep is largely a habit.The conditions refen-ed 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）.
第（21）题选
A.wished
B.expected
C.Needed
D.wanted
单项选择题
关于注册制下列说法错误的是（ ）。
A．发行公司拥有发行股票筹集资本的绝对自主权
B．实行以信息披露为中心的监管理念
C．各市场主体勤勉尽责
D．股票发行实行严进严管
单项选择题
（2013年）某设施甲苯尾气浓度为20mg/m3,风量为200000m 3/h，下列处理方法合理的是（ ）。
A.海水法
B.排烟再循环法
C.石灰石/石灰—石膏法
D.低温等离子体法
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