下述哪项产生绒毛膜促性腺激素（）
A.蜕膜
B.羊膜
C.合体滋养细胞
D.细胞滋养细胞
E.以上均不是
参考答案：C
Have you ever stopped _____ how our lie _____ if the world ran out of ol?
A．to think, would change
B．thinking, would change
C．to think, will change
D．thinking, should change
尿毒症病人肌酐清除率为10ml／min以下最理想的治疗方法是（）
A.利尿
B.纠正酸中毒
C.纠正贫血
D.透析
E.降血压
