The Centers for Disease Control and Prevention based the study on household telephone surveys in late 2007.
美国疾病预防控制中心的这次研究是建立在2007年年底的家庭电话调查的基础上。
This paper mainly analyzes the causes of concrete cracks and discusses the relative control measures and mending measures for further study on the prevention and mending, for reference only.
本文通过对混凝土裂缝成因的简要分析,对相关控制措施和修补方法进行进一步探讨,对裂缝的预防和修补具有借鉴意义,供大家参考。
Objective: To study the relationship between hypertension, diabetes and household heredity factors and to give advice on how to take the measures on control and prevention of these diseases.
目的:通过对高血压病、糖尿病与家族遗传史的调查,分析研究其内在的关联性,为制定防治措施提供依据。
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