2. 外语
  3. Scientist now have some surprising answers about whether brain power______as we get older.

Scientist now have some surprising answers about whether brain power______as we get older.

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问题 Scientist now have some surprising answers about whether brain power______as we get older.
选项 A、deduces
B、descends
C、collapses
D、declines
答案D
解析 本题考查动词词义辨析。decline，(数目、价格、比率)下降，衰退，衰落；descend指事物从一个较高的位置上落到较低的位置上，表示空间方位的变化，所以选项D符合句意。deduce，推断；collapse，倒塌，崩溃。
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