The ______ of AIDS has led to an expansion in research seeking a cure.

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问题 The ______ of AIDS has led to an expansion in research seeking a cure.

选项 A、innovation
B、selection
C、proliferation
D、conviction

答案C

解析 proliferation 意为“激增:扩散”如:proliferation of nuclear arms 核武器扩散;innovation 意为“革新,创新”如:“The innovation of air travel daring this century has made the world seem smaller.”;selection 意为“选择;选拔”;conviction 意为“定罪,判罪”,如:"This was his third conviction.”
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