试题与答案

下列分式中,其值可以为零的是( ) A.m2+1m2-1 B.m+1m2-1 C.m2

题型:选择题

题目:

下列分式中,其值可以为零的是(  )
A.
m2+1
m2-1
B.
m+1
m2-1
C.
m2-1
m+1
D.
m2+1
m+1

答案:

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