成分馏塔塔底温度波动的因素有哪些？如何控制？

短文改错。

    假定英语课上老师要求同桌之间交换修改作文,请你修改你同学写的以下作文。文

中共有10处语言错误,每句中最多有两处丁错误涉及一个单词的增加、删除或修改。

    增加：在缺词处加一个漏字符号（n）,并在其下面写出该加的词。

    删除：把多余的词用斜线（、）划掉。

    修改：在错的词下划一横线,并在该词下面写出修改后的词。

    注意：1.每处错误及其修改均仅限一词。

                2.只允许修改10处,多者（从第11处起）不计分。

     One day, a blind man was sitting on street with a sign by his feet that read:

"I am blind, please help me, A gentleman walked through and stopped to have

a look at the sign, noticed only a few coin in the man's hat.  He took out some

bills from his wallet and put it into the hat.  And then he turned the sign over again,

wrote a new message and left.  Several hours later, the gentleman returned  To his

happy, he found the hat almost full of bills and coins.  He didn't expect that the

new message does work, which read "It's spring now, and I can't see it."

____________________________________________________________________________

吐酸的主要病机是

A．麻子仁丸
B．更衣丸
C．三物备急丸
D．润肠丸
E．五仁丸

句型转换。

1. It's very hard to work out the math problem. (同义句)  

     ______ the math problem is very har.

2. I would like to come to China for my vacation. (改为一般疑问句)  

     ______ like to come to China for ______ vacation.

3. How about taking him to the Ming Tombs? (作肯定回答)  

    ______ ______!

4. Maria has to finish her homework first. (否定句)  

    Maria ______ ______ to finish her homework first.

5. We can explore the graves of ancient Chinese emperors. (就划线部分提问)  

     ______ ______ we explore?

数控铣床加工的换刀点应设在工件或夹具的外部。

单位对新职工应进行（）安全生产教育培训，危险性较大的行业和岗位教育培训时间不得少于（）小时。

A.全面；48

B.三级；48

C.三级；24

D.全面；24