应将管内残留的流质、切割渣屑等物清除干净，可以用烃类和洒精清洗管道。
更新时间:2024-11-24 05:59:56 1、正确错误
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I'm______tograduateinthenexthalfoftheyear.
________fromtheoccasionallatenightparty,ourneighborsareveryquiet.
设f(x,y)在点(0,0)附近有定义,且,则
Idon'tknowhowwecanmake________onthetimetableforanymorecourses.
Idon’tthinkyou'llchangehismind；oncehe’sdecidedonsosomethinghetendsto_____it.
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