配合气筒只是用来分配压缩空气的，底部可以不设排水管。( )

单句改错。每个句子都有一处错误，按下列情况改正：

错一个词：在错的词下面画一横线，并在该行右边横线上写出改正后的词；

多一个词：把多余的词用斜线（\）划掉，在该行右边横线上写出该词，也用斜线划掉；

缺一个词：在缺词处加一个漏字符号（∧），并在该行右边横线上写出改正后的词。

1. Six months ago Xie Lei said goodbye to her family and friends in China and boarded on a plane

    for London. __________

2. I thought I would get a really good mark but I got an E. I was numb of shock! __________

3. It was wonderful to hear from your letter. __________

4. Deaf people and dumb people are disabled too, who should be taken care. __________

5. He is annoyed by being making fun of. __________

6. I'm sorry that I made you to wait for me so long. __________

7. He likes to be quiet so let's leave him lonely. __________

8. My stolen car was found abandon by the riverside. __________

9. We haven't reached the deep before we find enough water. __________

10. He hasn't been used to speak in English. __________

11. Many students are died to volunteer to translate for the Olympic Games. __________

12. All the things which you told me are lies. __________

13. The present arrangement made by them are not really satisfactory. __________

14. Great changes have been taken place in China. __________

15. I have received a letter from a friend invited me to work in his company. __________

加1%FeCl₃试液显蓝色的是( )

A．大黄
B．人参
C．天麻
D．白芍
E．紫草

四季秋海棠是温室花卉，不耐寒，一般不用作花坛。

药品必须符合国家药品标准，指的是药品特殊性的（）

A.专属性

B.两重性

C.限时性

D.质量的严格性

E.社会责任性

统计量F是（）。

A．两个样本标准误之比

B．两个样本标准差之比

C．两个样本极差之比

D．两个样本方差之比

E．两个样本变异系数之比