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【单选题】
函数 y=f(x)在X= 处左、右极限都存在是极限 存在的()A.
充分非必要条件
B.
必要非充分条件
C.
充要条件
D.
既非必要也非充分条件
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【单选题】关于会计科目和账户的表述,下列各项中不正确的是( )。
A.
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B.
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C.
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D.
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