题目

—Sorry,I can’t find the books you asked for.  —______________  A.Don’t mention it.       B.Thanks anyway. C.It’s your fault.                    D.I won’t forgive you. 答案:B教室黑板的长为4.5m,宽为1.5m,长和宽的比是______,若改为分米做单位,长与宽的比是______,长是宽的______倍.
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