问题 单项选择题

浸泡解卡剂处理滤饼粘吸卡钻后,为预防砂桥卡钻,排除解卡剂的方法是()。

A、一直用大排量

B、先用小排量开通,一段时间后,再逐步增加排量

C、先用大排量开通,一段时间后,再逐步减小排量

D、一直用小排量

答案

参考答案:B

改错题
短文改错。
此题要求改正所给短文中的错误。对标有题号的每一行做出判断:
如无错误,该行右边横线上画一个勾(√);
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。
     Good health is the most valuable possession a person can have,   
so one can not regard good health as certain to happen. It's    
important to remember that body needs proper care in order       
to be healthy. There are three things that a person can do stay  
in good shape. Firstly, eat the right foods is good for health.  
Vegetables and fruits are specially important. Enough sleep    
is also important. Finally, get plenty of exercises. Sports are   
not only good for one's body, but it can also help build      
friendship with others people. If everyone were to do the three, 
the world would be a happier and healthy place.                 
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单项选择题