下列关于涡虫基本特征的叙述,正确的是( )   A. 身体呈辐射对

下列关于涡虫基本特征的叙述,正确的是(  )

   A 身体呈辐射对称

   B 寄生在人或动物体内

   C 没有专门的运动器官

   D 前端感觉器官集中,能最先感知外界刺激 

答案

D

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