2. 外语
  3. At the same time, medical and social science research began to indicate that retirement itself had detrimental effects.

At the same time, medical and social science research began to indicate that retirement itself had detrimental effects.

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问题 At the same time, medical and social science research began to indicate that retirement itself had detrimental effects.
选项 A、damaging
B、magnificent
C、useful
D、relevant
答案A
解析 各选项的意思是：damaging有破坏性的，损害的。magnificent宏大的，庄严的，堂皇的。useful有用的，有益的。relevant有关的；适当的。画线单词detrimental的意思是：有害的，不利的。根据句意可知，应选择A。
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