影响权证理论价值的主要有( )。
A．标的股票的价格
B．权证的行权价格
C．无风险利率
D．股价的波动率
参考答案：A,B,C,D
The employees were tired of working ______ hours and some of them even gave up their work.
A．special
B．extra
C．especial
D．spare
脊柱骨折常见的并发症有（）
A.呼吸系感染
B.泌尿系感染
C.压疮
D.骨质疏松
E.应激性溃疡
