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The number of books in the bookshop ______ (be) about 10,000 and most of them are about science.
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He said he would come to see us ________the next afternoon.
1年前
________ do you know that? My father told me about that.
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8个1角硬币,就是8个________元,是________元。
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已知多项式2x的四次方-3x的三次方+a倍x的平方+7x+b能被x平方+x-2整除,求a除以b
1年前