位于大椎穴与肩峰连线中点的是（）
A.肩井穴
B.天宗穴
C.哑门穴
D.肩中俞
参考答案：A
It looks________you are ill.You should go to see the doctor.[ ]
A. as
B. as though
C. which
D. whether
血浆的主要功能是：
