未知题型
According to the passage, human interferon____________
A.is a hormone that causes disease
B.could be used to treat cancer
C.is a viral disease
D.has been cured
A.isB.could
C.is
D.has
【参考答案】
B
题意：根据文章，干扰素……。题干的关键字humaninterferon，回原文通查，第三段主要讲述干扰素，根......
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