盐酸工段氢气压缩机的电机属于()。
A.高压电机
B.普通电机
C.防爆电机
参考答案:C
—— “Did you have breakfast this morning?
—— “_____.”
A.Yes, I had
B.Yes, I did
C.No, I hadn’t
D.No, I didn’t have.
A321飞机共有()个壁挂式液晶显示器。2
A.24个
B.23个
C.26个
D.25个