The article expounds and analyses some common crack problems in the concrete engineering and puts forward some prevention and treatment measures to the concrete situation.

本文对混凝土工程中常见的一些裂缝问题进行了探讨分析，并针对具体情况提出了一些预防、处理措施。

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The paper analyzes several problems which should be noticed in concrete proportioning design and poses appropriate measures for prevention and treatment.

对混凝土配合比设计中值得注意的几个问题进行分析，并提出相应的防治措施。

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Methods 277 cases of pediatric ADHD patients, the clinical data on the children read a detailed record, analyze the reasons for the incidence of ADHD in children, treatment measures and prevention.

方法选择277例小儿多动症患者，对患儿的临床资料进行详细的翻阅记录，分析小儿多动症的发病原因、治疗措施及预防方法。

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