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下列运算正确的是( ) A. (﹣3)+(﹣4)=﹣3+﹣4 B. (﹣3)+(﹣4)=﹣3+4 C. (﹣3)﹣(﹣4)=﹣3+4 D. (﹣3)﹣(﹣4)=﹣3﹣4
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lively/lovely/live/living/alive 1.The question set off a ________ discussion.
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