用油膏做防潮层的部位刮涂1～2遍，厚度约为1.5～2mm左右。但要注意在刮涂油膏前要涂刷冷底子油。( )
参考答案：对
With no penny _________ in his pocket, he was driven out of the rented house, _________ where to go.[ ]
A. left; knowing not
B. left; not knowing
C. leaving; not knew
D. to leave; not knowing
一般末经补偿的电压互感器的比差和角差，（）。
A、比差为正，角差为正
B、比差为负，角差为正
C、比差为负，角差为负
D、比差为正，角差为负
