严重的鼻中隔前方出血可结扎()。
A.筛前动脉
B.上唇动脉
C.上颌动脉
D.颈外动脉
E.颈内动脉
参考答案:B
张老师要买39张软盘和32张光盘,每张软盘6元,每张光盘要35元.他实际用了多少钱?
Most of the children can work out the problem, so it should be quite _____ to adults. [ ]
A. patient
B. plain
C. familiar
D. lucky