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-2的相反数是_______,绝对值是_______,倒数是________.
-1的相反数是_____,绝对值是_______,倒数是_______.
-3的相反数是_________,绝对值是_________,倒数是_________.
-7的倒数是________,它的相反数是________,它的绝对值是________;