制式爆炸装置主要从爆炸装置的()来分类,主要有机械发火引信装置、化学引信和电发火引信等。
A.引信
B.性能
C.基本构造
D.发火原理
参考答案:C, D
用括号内所给单词的适当形式填空,共5分
小题1:All those foreign (thief) have been caught.
小题2: Is Australia the (three) largest island country in the world?
小题3:Look, our dog Eddie is lying (comfort) on the grass.
小题4:There are a lot of differences between John and (I)
小题5:Our (know) of the universe is growing all the time.
轮对加工后同一轮对的两车轮直径差允许不大于()mm。
A.0.5
B.1
C.2
D.3