把12和18分别分解质因数，并指出这两个数有哪些相同的质因数．
12
18
12和18相同的质因数有
解：12=2×2×3
18=2×3×3
答：12和18相同的质因数有2，3.
分类、类比是初中化学常用的学习方法．
Please play with her and let her not feel .
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____ ____is it from your home to school?
