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- 参考书目 2024-12-23
- Unit 16 Negotiations 2024-12-23
- Unit 15 Offer and Counter-offer 2024-12-23
- Unit 14 Establishing a Business Relationship 2024-12-23
- Unit 13 Aftersales Service 2024-12-23
- Unit 12 Fairs and Exhibitions 2024-12-23
- Unit 11 Product Promotion 2024-12-23
- Unit 10 Company Presentation 2024-12-23
- Unit 9 Receiving visitors 2024-12-23
- Unit 8 Business Trip 2024-12-23