判断题

回弹法测量时,相邻两测点的净距一般小于20㎜。( )

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错误

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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。( )
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