颈内动脉的终支是（）
A.大脑后动脉
B.眼动脉
C.大脑中动脉
D.前交通动脉
E.大脑前动脉
参考答案：E
出汗时丢失最多的无机盐是（）
A.Na
B.Ca
C.Mg
D.P
E.S
—I feel stressed in my study from time to time. I don't know what to do.
—_________.[ ]
A. You should keep relaxed.
B. What about keeping your worries to yourself?
C. Why not ask the youth workers for advice?
D. You'd better pay no attention to your study.
