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下面是一组判断正误的题:(1)-x一定是负数;(2)-|x|一定是负数;(3)|x|一定不是负数;(4)若a=b,则|a|=|b|;(5)若|a|=|b|,则a=b;(6)若x<y,则|x|<|y|;(7)若|x|<|y|,则x<y;(8)若x是有理数,则3x>2x。初
The following is a set of questions to determine whether it is correct or not: (1) -x must be negative; (2)-|x| must be negative; (3)|x| must not be negative; (4) if a=b, then a |=|b|; (5) If |a|=|b|, then a=b; (6) If x2x. early