题目内容

假设1000件产品中有200件是不合格的产品,依次作不放回抽取两件产品,则第二次抽取到不合格品的概率为____。

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Ernest Hemingway was badly wounded in Italy and sent to a hospital where he fell in love with a nurse. These two persons later became the characters of his novel __________.

A. The Old Man and the Sea
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