取得报关单位资格的法定要求是( )。
A．经海关注册登记
B．境内法人或其他组织
C．对外贸易经营者
D．有一定数量的报关员
参考答案：A
She really impressed me a lot for I had never heard ______voice.
A．the more beautiful
B．a most beautiful
C． a much beautiful
D．a more beautiful
根据已配平的反应式：+4HNO3==PbO2+2Pb(NO3)2+2H2O，推断铅丹的化学式是[ ]
A．Pb
B．PbO
C．Pb3O4
D．Pb2O3
+4HNO3==PbO2+2Pb(NO3)2+2H2O，推断铅丹的化学式是[ ]