$_nowclass=$empire->fetch1("select * from {$dbtbpre}enewsclass where classid='$r[classid]'");
$listtemp='
';
甲乙两人都解方程组{ax+y=2,2x-by=1}(甲乙两人同解方程组ax+by=2,mx-7y=8)
大家好,我是编辑东磁,今天我来为大家解答
大家好,我是编辑东磁,今天我来为大家解答
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