2. 外语
  3. A doctor should examine the patient to ______ where the pain is localized.

A doctor should examine the patient to ______ where the pain is localized.

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问题 A doctor should examine the patient to ______ where the pain is localized.
选项 A、alienate
B、alternate
C、allocate
D、ascertain
答案D
解析 动词辨义。这四个选项都是动词，alienate表示“离间；使疏远”；alternate表示“(常与with连用)(使)轮流；(与between连用)(使)交替”；allocate意指“(常与to连用)分配；配给”；ascertain表示“发现；查明；确定”。根据句意，医生首先要确诊，然后才能看病，所以选D)。
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大学英语六级

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