[名词解释] C-E角

枕先露时，胎心应在() ["A．脐右上方","B．脐左下方","C．靠近胎背上方","D．脐右下方","E．靠近脐部"] 表叔侄的亲缘系数为() ["A．1","B．1/2","C．1/4","D．1/8","E．1/16"] Wimberger征 如图利用羊水、绒毛细胞和胎儿血细胞培养，检测染色体疾病属于哪种产前诊断常用方法() ["A．观察胎儿畸形","B．染色体核型分析","C．基因检测","D．检测基因产物","E．其他"] 骨性狮面 C-E角