What is the topic of this passage?
A. The late flights at O' Hare.
B. Agreement for cutting delays.
Chicago's O'Hare International.
D. Policy for aviation.
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甲企业按应收账款余额的5‰计提坏账准备,该企业年初“坏账准备”科目的借方余额为1000元,本年发生的坏账损失3000元,年末应收账款余额为1000000元。该企业年末应提取的坏账准备金额是()元。
A. 0
B. 9000
C. 5000
D. 4000