具有孕激素样作用的药物是（）.
A.A
B.B
C.C
D.D
E.E
参考答案：D
-How about going to the movies tonight?
-__________, but I have to do my homework first.[ ]
A. I can't
B. Sounds great
C. That's right
D. No, I'm terribly sorry
下列衍生工具中，不属于股权类产品的是( )。
A．股票期货
B．股票期权
C．股票指数期权
D．信用互换
