引起早爆的原因有()。
A.杂散电流
B.炸药变质
C.静电
D.冲击
E.封孔质量差
参考答案:A, C, D
(2)
A.家庭住址LIKE’%科技路%’
B.家庭住址LIKE’*科技路*’
C.家庭住址AS’%科技路%’
D.家庭住址AS’*科技路*’
---I regret _____you John has been fired.
---I can hardly believe my ears.He’s such a fine worker.
A.telling
B.having told
C.to tell
D.to have told