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【单选题】
下列关于视图的描述中，错误的是：A.
视图不是真实存在的基础表，而是一张虚拟表。
B.
当对通过视图看到的数据进行修改时，相应的基本表的数据也要发生变化。
C.
在创建视图时，当其中某个目标列是聚合函数时，必须指明视图的全部列名。
D.
在一个语句中，一次可以修改一个以上的视图对应的基表。
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举一反三
【单选题】听力原文：M: Excuse me. Have you been waiting long? W: About ten minutes. M: Did you notice whether the number seven bus has gone by? W: Not while I've been standing here. I'm waiting for the number seven ...
A.
Rainy and cool.
B.
Windy.
C.
Hot and dry.
D.
Cold and dry.
【单选题】听力原文：M: Excuse me. Have you been waiting long? W: About ten minutes. M: Did you notice whether the number seven bus has gone by? W: Not while I've been standing here. I'm waiting for the number seven ...
A.
She is waiting for the man.
B.
She is waiting for her mother
C.
She is waiting for a bus.
D.
She is waiting for it to stop mining.
【单选题】听力原文：M: Excuse me. Have you been waiting long? W: About ten minutes. M: Did you notice whether the number seven bus has gone by? W: Not while I've been standing here. I'm waiting for the number seven ...
A.
Cold.
B.
Very hot.
C.
Cooler.
D.
Drier.
【单选题】听力原文：M: Excuse me. Have you been waiting long? W: About ten minutes. M: Did you notice whether the number seven bus has gone by? W: Not while I've been standing here. I'm waiting for the number seven ...
A.
She is waiting for the man.
B.
She is waiting for a bus.
C.
She is waiting for her mother.
D.
She is waiting for it to stop raining.
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