可用作原料的废物的进口单位应事先取得( )签发的《进口废物批准证书》。
A．国家质检总局
B．国家环保总局
C．海关总署
D．商务部
参考答案：B
A:Do you know for advice when we have problems.
B:You can talk to your parents or teachers.
A．who to talk
B．when to talk to
C．who to talk to
D．who can we talk to
知识营销活动侧重于教育对象的（）
A.指导与训练
B.辅导与激发
C.引导与锻炼
D.培养与启发
E.培训与强化
