下列关于权证的投资策略，错误的是（）。 A.当投资者持有标的股_爱下问搜题

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问题单项选择题

下列关于权证的投资策略，错误的是（）。

A.当投资者持有标的股票，希望规避风险时，如果投资者不能把握标的股票的走势，则投资股票的同时，按照Delta值购买认沽权证进行风险对冲，可以获得低风险的稳定收益

B.当投资者认为标的股票将上涨时，可以直接投资认购权证，由于权证的杠杆效应，可以带来高额收益

C.当投资者认为标的股票将下跌时，可以直接投资认沽权证，在下跌中也能获利，且由于权证的杠杆效应，可以带来高额收益

D.当投资者认为标的股票将发生大的波动时，持有1个认购权证加2个认沽权证组合

答案

参考答案：D

完形填空

Mr. and Mrs. Green were very worried about their son, Leo. He seemed to be dumb( 哑的）       he was normal in every other way. Mr. and Mrs. Green tried everything to get him to      ,but with no success.When Leo was six years old, the best doctors in the town       him carefully, but could find nothing wrong.
And he seemed to be smart. It was just that he _     spoke.
“There might be something wrong with his         ，and he doesn’t know he's able to speak，’，one doctor said.“But he can read and write，，，said Mr. Green. “We’ve written him notes, telling him that he can speak. ”“It’s certainly very        ，” another doctor said. Perhaps he’ll be able to speak some day. ”     passed. Leo went to university. But he did not say a       word. Then one day,Leo was having a meal with his parents. Without any warning, he looked up from his        and said，“Pass me the salt,please. ”
Mr. and Mrs. Green were excited. “You spoke! You spoke!” they cried. “ Why have you        so long to speak?” “I didn’t have anything to say，，，he said. “Until now everything was perfect. But you forgot to put salt in potatoes. ”

单项选择题 A1/A2型题

同型半胱氨酸尿症是由于患者体内缺乏下列哪种酶所致（）.

A.尿黑酸氧化酶

B.胱硫醚β合成酶

C.组氨酸酶

D.精氨酸酶

E.苯丙氨酸羟化酶