c
分别是3\1\-1\-3
不懂追问,
abc均是不为零的有理数a/|a|+b/|b|+c/|c|的值有几个
abc均是不为零的有理数a/|a|+b/|b|+c/|c|的值有几个
A.2个
B.3个
C.4个
D.无数个
A.2个
B.3个
C.4个
D.无数个
其他人气:796 ℃时间:2020-03-23 03:47:24
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