2. 外语
  3. Optimism is a ______ shown to be associated with good physical health, less depression and longer life.

Optimism is a ______ shown to be associated with good physical health, less depression and longer life.

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问题 Optimism is a ______ shown to be associated with good physical health, less depression and longer life.
选项 A、trail
B、trait
C、trace
D、track
答案B
解析 名词词义辨析题。trail“足迹，踪迹”；trait“特性，特质”；trace“痕迹，踪迹”；track“轨迹”。主语“乐观”应与“特性，特质”搭配，故选B。
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