城市人民防空是一个系统，其中起核心作用的是（）。 A.通信警报系统 B.组织指挥系统

People who seek the advice of quacks and charlatans are those who ______.

A．are poorly educated

B．are highly educated

C．dislike medical treatments

D．mistrust physicians' truths

温 * * * * 曾说过说“ * * 的大门是面向广大群众的。”这反映了[ ]

A．我国实行人民代表大会制

B．我国是单一制国家

C．我国 * * 的本质是人民当家作主

D．我国实行 * * 党领导的多党合作制

铅酸蓄电池浮充电电压对于110V直流系统取( )，对220V直流系统取( )。

A．115V,230V
B．1lOV,220V
C．120V,240V
D．125V,250V

If you are on the beach and are signaling to a small boat in distress that your present location is dangerous and they should land to the left，you would（）.

A.fire a green star to the left

B.send the letter K by light and point to the left

C.place an orange signal to your left as you signal with a white light

D.send the code signal S followed by L

在分娩机转中，肛提肌对分娩的作用不包括

A．协助胎头内旋转

B．协助胎盘娩出

C．使胎头俯屈

D．使胎头仰伸

E．使胎头复位外旋转