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问题 单项选择题

为保证煤粉具有良好的流动性，煤粉贮存时间应计（）。

A、〈6h

B、〈4h

C、〈2h

D、〈8h

答案

参考答案：D

改错题
短文改错。
      对标有题号的每一行作出判断：
     如有错误（每行只有一个错误），则按下列情况改正：
     此行多一个词：把多余的词用斜线（\）划掉，在该行右边横线上写出该词，并也用斜线划掉。
     此行缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。
     此行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
     注意：原行没有错的不要改。
During a summer of 2001, I started reading books
in English, mostly stories. I would learn a lot of new
words from these books, but I had terribly problems
memorizing them. I had to look up to the same word
many times, for which was quite troublesome. I realized
I do need a way to remember all this vocabulary. It was
a great achievement for myself. I started writing down
words from books that I read. I would come back from
school, and then sit for an hour and two. I wrote down 
new words and added it to my collection. By the end
of last year,my collection has grown to 3,000 words.
1._____
2._____
3._____
4._____               
5._____
6._____
7._____
8._____
9._____
10._____
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问答题 简答题

怎样对霍乱患者进行隔离与消毒?
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