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[多选题]
有420袋牛奶,每6袋装一盒,每7盒装一箱,可以装多少箱正确列式是()
A.420÷6
B.420÷7
C.420÷6÷7
D.420÷6x7
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420÷6÷7
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.420÷6
B.420÷7
C.420÷6÷7
D.420÷6x7
420÷6÷7
水泥出厂前按同品种、同强度等级编号和取样。袋装水泥和散装水泥应分别进行编号和取样。每一编号为一取样单位。水泥出厂编号按年生产能力规定为:200×104t以上,不超过()t为一编号。
A.3000
B.3500
C.4000
D.5000