(2013·辽宁师范大学附中模拟)Fortunately it happened at night. If the hurricane ________ during the daytime, there ________ more deaths.

A．had happened; would have been

B．happened; would be

C．had happened; would be

D．happened; would have been

投资期分析法中两种确定性的组成成分是源于（）所引起的收益率变化。

A．时间成分

B．票息因素

C．到期收益率变化所带来的资本增值或损失(收益成分)

D．票息的再投资收益