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【单选题】
下列关于期权的说法中，正确的是( )。A.
实物期权属于看涨期权
B.
对于看涨期权来说，期权价格随着股票价格的上涨而上涨，但最高不会超过股价
C.
假设影响期权价值的其他因素不变，股票的波动率越大看跌期权价值下降，看涨期权价值上升
D.
对于未到期的看涨期权来说，当其标的资产的现行市价低于执行价格时，该期权处于虚值状态，其当前价值为零
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【简答题】电力系统中，备用容量按存在形式可分为两种：（）和（）。
【单选题】Tom was surprised to know that Asia is______ as Europe.
A.
four times large
B.
four times as large
C.
as four times large
D.
as large four times
【单选题】As we all know, Asia is _____ Europe.
A.
four times as large as
B.
bigger than four times
C.
four times as much as
D.
four times the size as
【简答题】用A和B分别表示两个比较项,数量用n表示,is 用BE代替,提炼表示倍数的句型公式。 Asia is four times larger than Europe. 这里可以提炼出来的表示倍数句型公式是____________________________。
【单选题】Asia is ______ Europe.
A.
four times larger as
B.
as four times large as
C.
larger four times than
D.
four times as large as
【简答题】电力系统中,备用容量按存在形式可分为两种:即热备用和 。
【单选题】Asia is _______ Europe.
A.
as large as four times
B.
as four times large as
C.
four times as larger as
D.
four times as large as
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