问题
单项选择题
外因性不均称型叙述下列哪项正确（）
A.出生后外表无营养不良表现
B.出生后躯体发育不正常
C.胎盘体积正常，但功能下降
D.各器官细胞数量不正常
E.胎儿无代谢不良
答案
参考答案：C
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外因性不均称型叙述下列哪项正确（）
A.出生后外表无营养不良表现
B.出生后躯体发育不正常
C.胎盘体积正常，但功能下降
D.各器官细胞数量不正常
E.胎儿无代谢不良
参考答案：C
of the housing units are equipped with cable television. If 
of the housing units, including 
of those that are equipped with cable television, are equipped with videocassette recorders, what fraction of the housing units have neither cable television nor videocassette recorders ？（）