风险构成要素为()
A.风险因素
B.风险事故
C.损失
D.直接损失
参考答案:A, B, C
We are going to have a party _____ this weekend.[ ]
A. some time
B. sometime
C. sometimes
D. some times
配合双作用千斤顶的油泵,宜采用两路同时输油的双联式油泵。( )