一般情况下，关于椎动脉椎动脉进入颅内经过的结构是（）
A.枕骨大孔
B.棘孔
C.卵圆孔
D.破裂孔
E.微骨孔
参考答案：A
---It’s said that Williams will come to help us.
--- we depend on him, we have to do most of the work ourselves.
A．No matter what
B．However much
C．Whatever
D．However
《中国药典》(2010年版)将中药收载于
A．一部
B．二部
C．三部
D．四部
E．五部
