锁骨上神经阻滞是阻滞了臂丛神经的哪一部分()。
A.根
B.干
C.股
D.束
E.支
参考答案:B
________ in the school regulations that students should not wear long hair or jewels.
A.It is required
B.What is required
C.What requires
D.It required
汽车产业中心的转移会使中国()
A.环境污染加剧
B.就业压力增加
C.人口向内地集中
D.产业升级加快