在取水构筑物进水口处，一般要求不小于( )m的水深。
A．1.5～2.0
B．2.5～3.0
C．1.0～2.0
D．2.0～4.0
参考答案：B
A 38-year-old client is admitted for alcohol withdrawal. The most common early sign or symptom that this client is likely to experience is
A．impending coma.
B．manipulating behavior.
C．suppression.
D．perceptual disorders.
避孕有效率最低的避孕方法是（）。
A.安全期避孕
B.外用避孕药
C.宫内节育器
D.短效口服避孕药
E.阴茎套
