井下爆破作业，（）使用煤矿许用装药和煤矿许用电雷管。

A、测量底座表面尺寸
B、测量水晶尺寸
C、测量底座加工尺
D、测量水晶加工尺

the officer feel when he herd the sound of shot he didn’t know wht to do B．he thought the young mn hd been ded C．he wnted to send the young mn to hospitl D．he thought the young mn ws hopelessA．he didn’t know what to doB．he thought the young man had been deadC．he wanted to send the young man to hospitalD．he thought the young man was hopeless