发布时间:2025-01-24 13:06:20
为方便计算,假设泳池的容积为两个时间的最小公倍数5*8=40,不需单位。则开上水管灌水速度为40/5=8,开排水管放水速度为40/8=5;两个开关同时打开,灌水速度快于排水速度,泳池里水增加的速度为8-5=3,则灌满所需的时间为: 40/3=13小时20分钟。
最近天气总是下雨,房间里面很重的霉味,柜子里面长满了霉菌,请问怎么可以除霉呀
2025-01-24 13:06:20最近家里装修买的复合实木门怎样才能检测出门是否中间是全实木怎样检测出中空的部分求大侠帮忙
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