供应筛窦的动脉是（）。
A.筛前动脉
B.筛后动脉
C.眶上动脉
D.鼻后外侧动脉
E.鼻后内侧动脉
参考答案：A, B, C, D
Lucy and Maria are talking ____ their classmates Tim. He isn't at school today.[ ]
A. on
B. with
C. about
D. to
以下何种情况不宜用氯化钾
A．尖端扭转室速B．心力衰竭并室性期前收缩C．醛同酮增多症D．Ⅲ度房室传导阻滞E．高血压
