发布时间:2025-01-19 07:17:17
假设泉眼流速为a,抽水机流速为b,井容量为c。那么4*15b=15a+c 8*7b=7a+c
则:5*xb==5a+c
x=11
住一个单元邻居家老人病死,给我家大门上粘块红布,是我摘下来好还是邻居后人摘
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