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【简答题】
下列关于动态游标和游标变量说法正确的是? A. type mytype is ref cursor return emp%rowtype; 上面这个强类型游标只能绑定emp表。不能绑定其他表。 B. type mytype is ref cursor return emp%rowtype; 上面这个强类型游标可以绑定 emp表的不同结果集。 C. type mytype is ref cursor return emp%rowtype; 上面这个强类型游标可以绑定 跟emp表的结构相同的结果集。 D. type mytype is ref cursor return emp%rowtype; 上面这个强类型游标可以绑定任意表的任意结果集。
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举一反三
【单选题】—You look upset. What’s the matter? —I had my proposal again.
A.
turning down
B.
turned down
C.
to turn down
D.
turned to
【单选题】听力原文：W：You look upset．Anything wrong? M：I failed in the physics exam again in spite of all the efforts I made． Q：What do we know about the man from the conversation? (15)
A.
He didn't work as hard as he was supposed to.
B.
He didn't pass the physics exam.
C.
He did better in an earlier exam.
D.
He found something wrong with the exam.
【简答题】设等比数列 的前 项和为 ,已知 则 的值为 ．
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