在黑火药、烟火药制造加工、储存场所,对电气设备选用的规定是( )
A.应选用本质安全型
B.应选用尘密结构型
C.应选用隔爆型
D.不应安装电气设备
参考答案:D
—Will you go for a picnic with your parents this weekend?
—It just _______ the weather. [ ]
A. because of
B. decides by
C. depends on
D. look at
主要油料的形态结构:()。