3岁，男孩。右手被大人突然后牵拉，哭诉右臂痛，活动受限。查体：右手拒绝取物，肘略屈，

—Your coat is very nice.  

— _____.    [ ]

A. Not nice

B. Thank you

C. You’re welcome

D. OK

臭氧层最主要的作用是( )

A．吸收由太阳辐射到地球的紫外线

B．吸收由太阳辐射到地球的红外线

C．把地球上的二氧化碳转化为氧气

D．把地球上的有害气体转化为有益气体

Binh is a young trainee who works for the customer service team in the Relax Hotel. While helping Sell Limited, a corporate client, to set up a meeting room for a conference, she accidentally dropped expensive equipment belonging to the client, causing irreparable damage. As a result, the client could not deliver the presentation as scheduled, causing considerable embarrassment.Sell Limited claimed that its reputation has suffered, as the audience included several valuable customers. In addition, it had to replace the equipment at a cost of 150 million dong.Required:Discuss the obligations of Binh and the Relax Hotel for the losses suffered by the client. (10 marks)

如何正确理解证实和证伪？