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问题
问答题
写出下列反应的主要产物,若涉及立体化学请注明。
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单项选择题
()是指买方只能在期权到期日方能行使权利。
A.看涨期权
B.看跌期权
C.欧式期权
D.美式期权
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选择题
The museum will open in the spring with an exhibition and a viewing platform ________ visitors can watch the big glasshouses being built.
A.what
B.where
C.when
D.why
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