数学
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±10 2.正数或0 3.±4±3±2±1 .04.（1）=（2）＞（3）＜（4）＜5.-1.3 6.1 7.略 8.b 9.d 10.c 11.c 12.c  13.略 14.2号球 15.10分之9  数学原地 8
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