在中枢神经中BZ受体密度最多在部位是（）
A.额叶皮层
B.枕叶皮层
C.海马
D.丘脑皮层
E.延髓
参考答案：B, E
When he applied for(申请)a _______in the office of the local newspaper he was told to see the manager.
A．location
B．career
C．position
D．profession
SH6型转辙锁闭器主要有哪几个机构组成？
