在更换SF6电流互感器的旧吸附剂时,应穿戴好()手套,避免直接接触皮肤。
A.乳胶
B.橡胶
C.棉布
D.塑料
参考答案:A
在一个算式里,既有加减法,又有乘除法,要先算乘除法,后算加减法.______.
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Families in big cities have ()children than they did thirty years ago.