瘀血形成的原因主要有（）。
A.气虚
B.血寒
C.血虚
D.血热
E.气滞
参考答案：A, B, D, E
Fu Mingxia _____ a lot of gold medals since 1996.[ ]
A. wins
B. won
C. is winning
D. has won
有限责任公司的监事会每年至少召开()次会议，监事可以提议召开临时监事会会议。
A.1
B.2
C.3
D.4
