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1 . According to scientists, our mental abilities begin to ________ from the age of 27 after reaching the highest level at 22.
A.differ | B.shrink | C.contract | D.decline |
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2 . The number of seals is d________ (减少) due to human beings’ hunting activities. (根据中英文提示填空)
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3 . It's said that our mental abilities begin to _______ from the age 27 after reaching the highest level at 22.
A.differ | B.depress | C.distribute | D.decline |
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