影响期权的因素主要有（）。
A.标的资产的价格
B.标的资产价格波动率
C.无风险市场利率
D.期权到期时间
参考答案：A, B, C, D
_______ of the students in our class _______ money to the quake-hit areas these days.
A．Two third; have raised
B．Two thirds; have raised
C．Two three; have donated
D．Two thirds; have donated
功能补气升阳，治疗中气下陷，久泻脱肛的药物首选
A．白术
B．柴胡
C．黄芪
D．升麻
E．党参
