盈利能力比率用来衡量管理层将销售收入转换成实际利润的效率，体现管理层控制费用并获得投

根据所给汉语或英语首字母写出短文中所缺英语单词的正确形式。

     Last week, my friends and I talked about the rules in our school. Here are some of our ideas.

     At our school, we have to wear uniforms every (1)d______. The problem is that all my classmates think

the uniforms are (2)丑的______. We think young people should (3)l______ smart and so we would like to

wear our own clothes. Our teachers believe that if we did that, we would concentrate more on our clothes

than our studies. We don't (4) 同意______. We would feel more comfortable and that is (5)g______ for

studying. If we can't do that, we should be (6)允许______ to design our own uniforms. That would be a

good way to keep both teachers and (7)学生______ happy.

     Besides, vacations should be longer. At present they're too (8)s______. Longer vacations would give us

time to do things like volunteering. Last summer I had a(n) (9)机会______ to volunteer at the local hospital,

(10)b______ I couldn't because I had to go back to school.

有一阀门型号为Z964Y-6型，该阀是（）连接。

A、法兰

B、焊接

C、螺纹

D、卡箍

配制100ml 25%金银花注射液(其50%冰点为0.05℃)，需加入多少克氯化钠才能配成等渗溶液

A．0.70g

B．0.80g

C．0.81g

D．0.82g

E．0.85g

用所给词的正确形式填空。（10分）

1. Why is cold water                   (help) to treat a small burn?

2. This car can run by                   (it), so it’s very expensive.

3. Something is wrong with him. He looks                   (worry).

4. Some students don’t know the                (important) of learning English well.

5. Brian enjoys                   (sell) cookies. 

6. We won’t play football if it                   (rain).

7. --- I don’t know what to wear to the party?

--- If I                   (be) you, I’d wear a shirt and tie.

8.                    (friend) is more important than money between friends.

9. Children should go to bed before ten every light, or they will be __ ___ (sleep) in class.

10. A good                   (listen) will help you a lot when you study.

储罐专用于储存（）的化工品。