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Quiz. Coleman: Thank you very much. I’ll surely go if no unexpected event occurs. It will be my first time to China. I wish to get your help and receive your invitation letter for visa _____ . (Unit2 Part3 Acvitiy2)

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Quiz. Lawrence: You all have been working very hard lately. You’ve created enough excitement at our booth and brought energy to the show. I want to say our _____ at the trade show was a success. What are your impressions? Maria:The show was really fantastic! It almost gave me the illusion that the financial crisis never happened. (Unit02 Episode1)

Quiz. Angela: Maria, will you please pass to Lawrence the trade show report? Lawrence: Thank you. Very good! It seems the product demonstration has _____ our brand. (Unit02 Episode1)

纯液体当温度升高时液体的表面张力如何变化?()

A. 升高
B. 降低
C. 不变
D. 无法确定

表面活性物质加入水中后,水溶液的表面张力()

A. 增大
B. 减小
C. 不变
D. 先增大后减小

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