含羞草受到碰触时,展开的叶子会合拢这说明( ) A.需要营养 B.

含羞草受到碰触时,展开的叶子会合拢这说明(  )

A.需要营养 B.能对外界刺激作出反应

C.能排出废物   D.能进行生长

答案

B

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