髁突颈部骨折时,最可能伤及()
A.翼丛
B.上颌动脉
C.面动脉
D.颈内动脉
E.颈外动脉
参考答案:B
在估算城市人口时,可以不考虑的是( )。
A.社会发展的一般规律B.区域人口总量C.经济发展的需求D.环境的容量
The teachers often tell their students ________ their pens in class.[ ]
A. not to play
B. not to play with
C. to play
D. to play with