给水管网设计要求中，城镇给水管道与建筑物、铁路和其他管道的水

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问题多项选择题

给水管网设计要求中，城镇给水管道与建筑物、铁路和其他管道的水平净距，应根据建筑物基础的结构、路面种类、卫生安全、管道埋深、( )及有关规定等条件确定。

A．官道上附属构筑物的大小
B．管径
C．施工条件
D．管内工作压力

答案

参考答案：A,B,C,D

阅读理解

Students’ questions	Headmaster’s answers
小题1:Which do you think is the best middle school in our town?	A. I think they are all very great. They work really hard. They are all good at teaching and they are good with you all.
小题2:In your dream, what are students in our school like?	B. We know it’s very important for everyone to study subjects and learn other things. I think you should know what you like to do first, and then try to do it better. But you should also try to study better. It’s good for you to find a good job.
小题3:What do you think of our teachers?	C. I think our school is the best. Because you are the greatest, and we also have so many great teachers here. And your parents send you here, because our school is the best.
小题4:I want to join some clubs, but there are not many clubs in our school. Why not have more clubs for us?	D. Every student likes our school and likes to study. They are good at schoolwork and other things. They are smart and healthy. They love their parents and teachers, too.
小题5:I’m not good at all subjects. I hate to study. But my parents want me to study. What can I do?	E. It’s a piece of good advice. We have some clubs for Grade 7 students now. And we are going to have more clubs for all students. I hope every student can have a good time at school.

单项选择题 B1型题

属于内源性生物性污染的是（）

A.鱼饲养在甲肝病毒污染的水体中，鱼肉被甲肝病毒污染

B.从业人员在加工鱼制品过程中导致的葡萄球菌菌污染

C.饲料中含有违禁化学药物导致的污染

D.为了鱼的保鲜，在存储过程中使用甲醛导致的污染