Tom often makes his brother___but yesterday he was made___ by his brother.

A．cry; to cry

B．to cry; cry

C．cry; cry

D．to cry; to cry

胎盘由以下哪些组织合成：

A．滑泽绒毛膜+包蜕膜+羊膜

B．滑泽绒毛膜+底蜕膜+真蜕膜

C．叶状绒毛膜+包蜕膜+真蜕膜

D．叶状绒毛膜+底蜕膜+羊膜

E．叶状绒毛膜+底蜕膜+真蜕膜