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“x≠y”是“sinx≠siny”的( )条件. A.充分不必要 B.必要不充分...
“x≠y”是“sinx≠siny”的( )条件.
A.充分不必要
B.必要不充分
C.充要
D.既不充分又不必要
考点分析:
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