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重工业例如钢铁、水泥、汽车属于完全垄断市场结构类型。
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If you are not clear about a young lady’s marital status, it is polite to call her “Miss”.
In written form, the use of title with the person’s full name is acceptable, for example, “Mr. John Smith”.
You can ask foreign guest how they would like to be called and to tell what you would like them to call you.
If you are busy, you can sent a representative to meet the foreign guests at the airport.
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