冷冻机油泵断路器的热脱扣器用作（）。
A、短路保护
B、过载保护
C、欠压保护
D、过流保护
参考答案：B
下面哪种物体不能进行呼吸[ ]
A．猴子
B．病毒
C．桃树
D．土壤
_______,parents should spend as much time as they can________with their children,thus they can influence them on the value of life.
A．It is said;to be
B．They say;being
C．As is said;to be
D．It is said that;be
