题目:
胎盘由下列哪项组成()
A.胎儿丛密绒毛膜与母体擘蜕膜
B.胎儿平滑绒毛膜与母体底蜕膜
C.胎儿丛密绒毛膜与母体底蜕膜和羊膜
D.胎儿丛密绒毛膜母与件体包蜕膜
E.胎儿平滑绒毛膜与母体包蜕膜
答案:
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One possible version:The 60th National Day is coming along with the splendid celebration in Beijing. In the past 60 years, Great changes have taken place, which makes us...