词汇考查。

1. Would you                (介意) my opening the door?

2. We must be p              if we ask others questions.

3. She works in a restaurant, and she is a w             .

4. When this h________, I will get angry.

5. I really can't work out the math problem. Can you find out a s              ?

6. When you are waiting for a bus, you should wait in l________.

7. He is always ready to help people in t________.

8. "Etiquette" means normal and polite b              .

9. Please give me some s               about learning English.

10. Young kids are not a               to smoke in our country.

现有弹簧、钩码、直尺、指针等器材，小华要自制一个弹簧测力计，他首先测出弹簧的长度l₀=2.10cm，然后在弹簧的下端挂上不同的钩码，测出弹簧的长度l，算出比原长l₀伸长的量Δl（Δl=l-l₀），测量的数据如下表：

（1）从上表中的数据可以看出拉力F和弹簧伸长Δl的关系是：______________________；

（2）小华继续做实验．得到的数据如下：

从上表的数据可以看出，拉力达到_________N时，拉力和弹簧伸长的关系就改变了。因此，弹簧测力计的范围只能达到___________N。