题目

Facebook means never having to say goodbye. The social media web site has earned a reputation for reconnecting old friends. Last week，a guy whom I hadn't seen since my bachelor  party five years ago sent me a friend request. I accepted and waited for Easy E to send me a  greeting of some kind. He had sought me out，after all. I learned from his profile that he was in a relationship and had a son. However，I'm pretty sure we won't ever write wall―to―wall，let alone e―mail each other. But he'll remain  a friend of online until one of us makes a point of removing the other from his 2．花的结构中最终能够发育成图中a的是（　　）A．子房B．胚珠C．花托D．花瓣