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已知某并联管路的两支路的沿程阻力系数之比λ1/λ2=1，管长之比 l1/l2=4，管径之比d1/d2=2，则相应的流量之比Q1/Q2=         。

单选题
2021-07-17 23:36
A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/ueditor/jsp/upload/image/20161124/1479991237470060431_blob.png" title="6262850676835818" alt="blob.png"/>
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/ueditor/jsp/upload/image/20161124/1479991246241089379_blob.png" title="5089589349130861" alt="blob.png"/>
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/ueditor/jsp/upload/image/20161124/1479991254773087527_blob.png" title="482726382552705" alt="blob.png"/>
D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/ueditor/jsp/upload/image/20161124/1479991263501045273_blob.png" title="6290895243027512" alt="blob.png"/>
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B
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标签： 给排水工程技术 高起专 水泵风机与站房 2019级第三学期期末考试 给排水科学与工程 专升本 2019级毕业清考（考试分） 清考
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