某破碎机一个月内故停100小时,其中电气故障10小时,求电气故障的比率。

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问题:

某破碎机一个月内故停100小时,其中电气故障10小时,求电气故障的比率。

考点:破碎工考试初级破碎机工初级破碎机工题库
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单句改错题

若多一词; 把多余的词写在相应的位置上,用斜线划掉

若缺一词; 在答题卡相应的位置上写出该加的词,并附带前(后)的词

若错一词; 在答题卡相应位置写出改措辞和改正后的词

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3. Geography plays a part of making dialects.

4.  She shows a very positive attitude at her work

5. The textbook includes twelve units, including two revision units.

6. My friend insisted finding a taxi for me after we had a party.

7. I have 2sisters, both of them are doctors.

8. I shall never forget those years which I lived in the farm which you visited last week.

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D、有毒物质多

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