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________evidence that language acquiring ability must be stimulated.

A.If being

B.It is

C.There is

D.There being

 

【答案】

C

【解析】略

 

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    1. A.
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    2. B.
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    3. C.
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    4. D.
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    4. D.
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  3. 3.

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    2. B.
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