某投资者卖出认沽期权,意味着其在规定期权(如到期日)有()按行权价()指定数量的标的证券。
A、义务;买入
B、义务;卖出
C、权利;买入
D、权利;卖出
参考答案:A
"_____ you've made! But you should work still harder," Dad said to me.[ ]
A. What big mistake
B. How big mistakes
C. What great progress
D. How great progress
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