What can be learned about Mr. Golvin according to Paragraph 5?
A．He doubted about the positive effect of market competition.
B．He pointed out flaws of the newly developed mobile payment system.
C．He explained characteristics of a successful mobile wallet product.
D．He paid more attention to the technology than to market reaction.

判断题混凝土表面湿度愈大，回弹值愈小。( )

判断题采用工作应变计温度互补时，试件材料应为非匀质材料。( )

未分类题In Paragraph 4, the author implies that the alliance of Starbucks and Square______.A．may create a whole-new mobile payment systemB．may have stimulated the alignment of the big retailersC．may accelerate the development of mobile wallet systemD．may be a threat to profits of current mobile service providers

判断题结构动力特性参数与外荷载无关。( )

未分类题The phrase 'make a grab'(Line 5, Para. 4)is closest in meaning to______.A．realize huge profitsB．make a great changeC．face a fierce competitionD．take collective actions