串联的两级除尘器的效率分别为80%和90%，则除尘系统的总效率为（_爱下问搜题

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问题单项选择题

串联的两级除尘器的效率分别为80%和90%，则除尘系统的总效率为（）。

A.80%

B.95%

C.98%

D.99%

答案

参考答案：C

解析：除尘系统的总效率=1-（1-80%）（1-90%）=98%。

阅读理解

阅读理解。

Dear Editor,
I'm an overweight (超重的) girl. People always make fun of me. At school, I don't spend much time with
other students and don't like to join in activities that I enjoy because I'm afraid people might laugh at me.
①What should I do? Please tell me.
Lily

Dear Lily,
    ②No matter what you weigh, you should be treated with kindness. People who make fun of you are
making a mistake. They should accept you for who you are.
     My advice for you is to pay no attention to your classmates' comments and all the rude things they may
say about you.③Don't let them upset you, or you will have a bad time all day.
     At the same time, you shouldn't ④distance yourself from them. Instead, find someone you trust (信任)
and develop a friendship with him or her. Then you'll feel happier and safer. And don't be afraid to take part
in any activities you like. Remember: ⑤People are more interested in your behavior than your weight.
     If you feel that your weight is really becoming a problem, then you can start doing things that ⑥                                (让你感觉好一些) about yourself. You could take up exercise such as running,
swimming or jumping rope. Also, you could eat less junk food but something healthier.
                                                                                                                                                Editor

1. (A)用一个适当的英语单词替代文中②处划线部分No matter what：                  .
    (B)猜猜文中④处划线部分distance的汉语意思：                   .
2. 将文中⑤处的划线部分翻译成汉语：                                             .
3. 根据文中⑥处的汉语提示，用英语将句子补充完整：                                                   .
4. 将文中①处划线部分合并成一句： Please tell me                                                   .
5. 写出文中③处划线部分的同义句：                                                 .

单项选择题 A1/A2型题

患者，男性，32岁，近1周来出现发热乏力、咳嗽咳痰、脓痰，量多，有腥臭味。胸片示：右肺下叶后基底段大片阴影，有空洞和液平。血常规WBC17×109/L，该患者最可能患病（）

A.肺脓肿

B.肺大疱

C.肺鳞癌

D.白色念珠菌肺炎

E.肺结核空洞