下列哪支动脉不组成willis环（）
A.两侧大脑前动脉
B.后交通动脉
C.前交通动脉
D.两侧大脑中动脉
E.两侧大脑后动脉
参考答案：D
纪晓岚故居原来名为：
A．绿林书屋
B．丹柿小院
C．南海会馆
D．阅微草堂
– ________.
– With pleasure.
A．Excuse me for interrupting.
B．Is there anything that I can do for you?
C．Why not wear some flowers tonight?
D．Would you please look after my car for a moment?w
