cm,m,m,cm
对带有()及其以上电压的信号设备进行作业时,一般应切断电源或双人作业。
A、36V
B、40V
C、110V
D、220V
My suggestion is ______ we should have mercy ______ these homeless children and offer them some help.
A.that; on B.what; toC.which; for D.that; for