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-(-)2的相反数是________,倒数是________,绝对值是________.
-|-6|的相反数是________,它们的和是________.
-x是________的相反数,的相反数是________,的相反数是________.
-(-2)的相反数是________,|-3|的倒数是________.
是________的相反数,a-1的相反数是________.