关于基底动脉的叙述正确的是（）
A.穿经枕骨大孔
B.走行在延髓背侧
C.直接参与围成大脑动脉环
D.分出大脑后动脉
E.与小脑腹侧相邻
参考答案：D
----Did you ________ yourself in Beijing?
----Yes, I had _________ places of interest in Beijing.
A．have; fun to visit
B．enjoy; fun to travel
C．have; fun traveling
D．enjoy; fun visiting
863计划的倡导者是
①钱学森②王淦昌③王大珩④杨嘉墀⑤陈芳允⑥袁隆平⑦邓 * * [ ]
A．①②③④
B．②③④⑥
C．②④⑤⑦
D．②③④⑤
