在建筑给水系统中，一般采用体积小、结构简单、效率高的水泵是（）。
A.轴流泵
B.真空泵
C.离心泵
D.混流泵
参考答案：C
从A、B、C、D四个选项中找出一个错误的并改正。
1. He and his friends had a fun playing basketball. _____
A B C D
2. Tom borrowed these new shoes to Jim last night. _____
3. He didn't went to school last week. _____
4. Jack went to see his teacher and asks some questions. _____
5. He drove his new car and stoped in the street yesterday. _____
“法律由议会制定，法律一旦制定，国王就不能终止。”这一材料所反映的现象开始于[ ]
A．克伦威尔执政时期
B．查理一世统治时期
C．查理二世统治时期
D．《权利法案》颁布后
