支配臂前肌群和前臂外侧皮肤的神经是（）
A.胸背神经
B.肌皮神经
C.肩胛下神经
D.臂内侧皮神经
E.前臂内侧皮神经
参考答案：B
I decided to go to the library as soon as I ______.
A．finished what I was doing
B．finished what I did
C．would finish what I was doing
D．finish what I did
王老师买3本日记本用去25.5元，买3支钢笔用去16.65元．一本日记本和一支钢笔谁贵？贵多少元？
