保险单据主要有（）。
A.保险单
B.保险凭证
C.保险收据
D.暂保单
E.投保单
参考答案：A, B, D, E
— Will you please write your note on "Red Apple" and it to me tomorrow morning?
— What about the day after tomorrow? My computer doesn't work well now. [ ]
A. take
B. bring
C. e-mail
D. give
大直径的滑动轴承承受的载荷方向是（）
A.轴向
B.径向
C.不确定
D.轴向和径向同时存在
