单选题：It can be inferred from the passage that donor heart________

题目分类：卫生类
题目类型：单选题
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题目内容：

It can be inferred from the passage that donor heart__________. A．saved the lives of about 2100 Americans the year before the report
B．will be replaced by self-contained artificial hearts sooner or later
C．are more popular and cheaper than self-contained artificial hearts
D．can help patients survive less than 15 years if they are in good transplant

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答案解析：

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分类：卫生类题型：单选题