2. 外语
  3. The______of AIDS his led to an expansion in research seeking a cure.

The______of AIDS his led to an expansion in research seeking a cure.

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问题 The______of AIDS his 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 during 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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