I wonder _____there are so many natural_爱下问搜题

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问题选择题

I wonder _____ there are so many natural disasters across the world. [ ]

A. why is it that

B. what is it that

C. what it is that

D. why it is that

答案

答案：D

判断题

堆垛起重机是代表立体仓库特征的标志之一。

单项选择题

在下列的SQL语句中，属于数据控制语句的是( )。 Ⅰ．CREATE Ⅱ．SELECT Ⅲ．UPDATE Ⅳ．GRANT Ⅴ．DROP Ⅵ．DELETE Ⅶ．ALTER Ⅷ．INSERT Ⅸ．REVOKE

A．Ⅰ、Ⅴ、Ⅵ、Ⅶ

B．Ⅳ、Ⅸ

C．Ⅱ、Ⅲ、Ⅵ、Ⅷ

D．Ⅰ、Ⅴ、Ⅶ