大椎与肩峰连线的中点处为()
A.天髎穴
B.曲垣穴
C.巨骨穴
D.肩井穴
E.秉风穴
参考答案:D
I think you’ve got to the point where a change is needed , _____, you’ll fail .
A.however
B.therefore
C.otherwise
D.besides
否定之否定规律揭示了事物发展的方向和道路。 ( )