我国的五家大型商业银行被称为“五大行”，它们的机构性质是( )。
A．国有企业
B．事业单位
C．国家机关
D．政府部门
参考答案：A
---Excuse me, could you tell me _______________________?
--- It will leave at 3:00 p.m.
A．when will the plane leave for Shanghai
B．when the plane will leave for Shanghai
C．how will you go to Shanghai
D．how you will go to Shanghai
可引起肝血管肉瘤的毒物是（）
A.苯
B.聚乙烯
C.联苯胺
D.氯乙烯
E.铬酸盐
