多项选择题

用户反馈收集的内部渠道主要包括（）

A．客服咨询
B．微信朋友圈
C．用户投诉
D．电话录音

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单项选择题

It is usually the responsibility of the ________ to maintainlife-saving appliances in good condition.
A、Chief Officer
B、Second Officer
C、Third Officer
D、bosun

Tariffs can be of two types: (1), designed to raise the retail price of imported products so that domestic goods will be more competitive and foreign business will be discouraged from shipping certain goods into the country, and (2), designed to raise money for the government.

答案：填空(1)： protective tariffs 。填...