She made the request that all the problems of pollutions ______ at the next meeting.
A. is being discussed
B. was being discussed
C. be discussed
D. would be discussed
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下面关于命令DO FORM XX NAME YY LINKED的叙述中，( )是正确的。
A. 产生表单对象引用变量XX，在释放变量XX时自动关闭表单
B. 产生表单对象引用变量XX，在释放变量XX时并不关闭表单
C. 产生表单对象引用变量YY，在释放变量YY时自动关闭表单
D. 产生表单对象引用变量YY，在释放变量YY时并不关闭表单
UPDATE语句的功能是______。
A. 定义数据
B. 修改数据
C. 查询数据
D. 删除数据
Which statement do you agree with after your reading
A. When the power failure hit New York City, people only minded their own business.
B. Nobody needs all the machines we have made till now.
C. People used to pay each other with their building, raising, and so on.
D. People have difficulties in finding a good neighbor today.
假定一棵二叉树的结点数为18个，则它的最小高度为______。
A. 4
B. 5
C. 6
D. 18
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