试题与答案

常规堵漏材料一般分纤维材料、片状材料和粒状材料三类,要取得好的堵漏效果,三种材料需按

题型:单项选择题

题目:

常规堵漏材料一般分纤维材料、片状材料和粒状材料三类,要取得好的堵漏效果,三种材料需按一定的比例混合使用,片状材料:纤维材料:粒状材料的比例为()。

A.1:2:3;

B.1:3:2;

C.3:2:1;

D.2:1:3。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:如图所示13所示为测量平面直角坐标系和数学平面坐标系。

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