用游标卡尺测量工件,读数时先读出游标零刻线对()刻线左边格数为多少毫米,再加上游标上的读数。
A.尺身
B.游标
C.活动套筒
D.固定套筒
参考答案:A
—I think your father is very busy.
—So he is. _______ he still takes a walk with us sometimes. [ ]
A. So
B. And
C. Or
D. But
对于配电板处的火灾,不能选用的灭火剂是()。
A.1211
B.泡沫
C.干粉