发布时间:2025-01-31 14:17:45
不能用钢刷会把玻璃刮花的。用盐酸,如果水泥凝固成一块一块,在上面到少许盐酸过10分钟用抹布就可以擦掉,如果是一片一片的,直接用带有盐酸的抹布去清洗。
图书架共有三层存书上层存书数占总数的74724如果从下层拿五本书到放到上层则三层存书本数相同这个书
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