【爆破安全规程】规定,用来导通电雷管的仪表工作电流不应超过()。
A.15mA
B.30mA
C.45mA
D.60mA
参考答案:B
-- What's wrong with you, Sandy? You look so worried.
-- My pet cat _______ by a car this afternoon. And it is in hospital now.
A. is hit B. was hit C. hit
NaOH溶液应存放在带橡皮塞的瓶中