雷士照明总裁兼董事长是()
A.吴亚军
B.张长虹
C.张锋
D.吴长江
参考答案:D
—_____ is the hospital from here?
— It’s about three kilometres away from here.
A.How long B.How far C.How often
溢流阀起稳压、安全作用时,一般安装在()的出口处。
A.液压泵
B.换向阀
C.节流阀
D.安全阀