已兑付或代保管有价证券应分类保管，严禁与（）混放。
A.现金
B.金银
C.未发行证券
D.外币
参考答案：C
性情感指人类对性对象、性行为是否符合自身需要所产生的态度体验，主要包括（）等。
–Why do you like climbing mountains?
--Because they are there and climbing is _____thing I have ever done.
A．the more exciting
B．the most exciting
C．the more excited
D．the most excited
