30 造成中度或重度智障(Moderate or Severe mental retardation),最可能之病因?
(A)唐氏症(Down’s syndrome)
(B)動機缺乏
(C)輕微腦功能異常(Subtle deficits in brain function)
(D)肥胖症

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統計: A(63), B(1), C(9), D(0), E(0) #333127