题目内容
要使分式有意义,只需
A.x≠1
B.x≠-2
C.x≠2
D.x≠±2
A.x≠1或x≠-3 B.x≠-1或x≠3
C.x≠1且x≠-3 D.x≠-1且x≠3
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A.x≠1或x≠-3 B.x≠-1或x≠3
C.x≠1且x≠-3 D.x≠-1且x≠3