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The pH values were monitored （）(use) a pH meter
The pH values were monitored （）(use) a pH meter
正确答案：using
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研究生英语科技论文写作
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The composition of the steel （）(present) in Table1.
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In order to account for the correct advancement process of the machine,regardless of the path,and independently of the mesh,a remeshing scheme as well as a steering algorithm recently （） (incorporate) into the capabilities of the tunnel model (Alsahly,Sta