题目

若(x+8)(x-1)=x2+mx+n任意x都成立,则m+n=( ) A . -8 B . -1 C . 1 D . 8 答案:B--The story is so amazing! It’s the most interesting story I’ve ever read.--But I’m afraid it won’t be liked by________.A. everybody B. somebody C. anybody D. nobody
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