Violence (暴力) in films has a bad effect ____ people.[ ]
A. in
B. to
C. with
D. on
答案:D
选煤产品脱水大致分为重力脱水.离心脱水.过滤脱水.压滤脱水和干燥脱水。
35kV配电装置冲击绝缘水平较高,故35kV变电所的避雷针可以装设在其构架式房屋顶上。()