持ATA单证册向海关申报进出境展览品，不需要向海关提交进出口许可证，也不需要另外再提供担保。
参考答案：对
The old man often advised the young workers on _________the machine and they learned quickly. [ ]
A. to operate
B. how operate
C. how operating
D. how to operate
心绞痛心肾阴虚证的治疗方剂是
A．枳实泻白桂枝汤 B．血府逐瘀汤 C．补阳还五汤 D．左归丸 E．右归丸
