某条C语句如下。
structexint x；float y；char z；)example；
则以下叙述中不正确的是（）。

A．struct结构体类型的关键字

B．x,y,z都是结构体成员名

C．struct ex是结构体类型

D．example是结构体类型名

根据括号中所给的汉语写出单词，使句子意思完整正确。

小题1:There’s something wrong with my computer. I have to         （重启） it.

小题2:Simon wants to have a robot with four small         （轮子）.

小题3:I want to go to the bookshop. Could you         （借） me your bike?

小题4:The young mother told her child not to play with the         （锋利的） knife.

小题5:Everyone should try to be _________（有礼貌的） and helpful to others.