正常人直立时,脊柱从侧面观察有四个弯曲部位,即()。
A.颈段稍向前凸
B.胸段稍向后凸
C.腰椎明显向前凸
D.腰椎稍向后凸
E.骶椎明显向后凸
参考答案:A, B, C, E
— We can use QQ to communicate with each other online.
— Good. Will you please show me _______. [ ]
A. which to use
B. how to use it
C. what to use
D. where to use it
影响中药质量的主要因素有
A.栽培
B.采收加工
C.产地
D.贮藏
E.运输