阅读下面短文，掌握其大意，从A、B、C、D四个选项中选出最佳选项。
Dear Dad,
I’m writing to you because it’s not easy to talk about it. I still
1 clearly how my uncle died two years ago. In fact, I seriously want to ask you to stop smoking. I’ve looked up a lot of information about smoking and I found out something
2 .
You know that smoking is bad for your
3 and can cause cancer. I’ve learnt that it causes many other
4 too. Do you know that over ten thousand people die from smoking every year in Britain?
When mum asks you to smoke
5 , you think she’s angry. Well, it’s true that she doesn’t like the
6 of smoke in the house. When you smoke, it’s also
7 for mum and me. In other words, when we
8 in your smoke, it’s like we’re smoking ourselves.
9 , we can also get disease. Doctors are finding that more and more
10 are falling ill because of the others’ smoking.
I know that it’s very
11 to stop smoking, but you must give it up. Please see the doctor and ask him
12 help. We will do anything we can to help you. You must try to
13 your own life. We don’t want to
14 you because you are so important to us.
15 you, who can help me with my maths homework or mend my bike? Please don’t smoke!
Your daughter,
Meimei
| 【小题1】 | | A．remember | B．forget | C．think | D．feel |
|
| 【小题2】 | | A．interesting | B．Terrible | C．boring | D．strange |
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| 【小题3】 | | A．health | B．study | C．work | D．mind |
|
| 【小题4】 | | A．things | B．mistakes | C．feelings | D．illnesses |
|
| 【小题5】 | | A．nowhere | B．anywhere | C．outside | D．inside |
|
| 【小题6】 | | A．color | B．smell | C．shape | D．taste |
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| 【小题7】 | | A．useless | B．useful | C．bad | D．good |
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| 【小题8】 | | A．move | B．rest | C．arrive | D．breathe |
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| 【小题9】 | | A．However | B．As a result | C．In fact | D．For example |
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| 【小题10】 | | A．doctors | B．nurses | C．non-smokers | D．smokers |
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| 【小题11】 | | A．difficult | B．easy | C．important | D．dangerous |
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| 【小题13】 | | A．save | B．waste | C．refuse | D．accept |
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| 【小题14】 | | A．trouble | B．lose | C．hurt | D．keep |
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| 【小题15】 | | A．With | B．Without | C．Behind | D．By |
|
，求随机变量
以及方差