三、砷及其化合物(arsenic and its compounds) 1．砷及其化合物的理化性质及用途 砷元素 属于类金属，元素砷不溶于水和强酸，因此几乎没有毒性。
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This paper has given an analysis on where arsenic comes from, present pollution situation, and description of arsenic and its compounds' harmful effect on environment and life things.
主要介绍了砷的基本性质及水环境中砷污染的来源、现状，阐述了砷及其化合物对环境和生物所造成的毒害。
Objective: To explore the interaction of gene with arsenic compounds, arsenic related gene was cloned and its function was analyzed by bioinformatics.
目的：探讨砷化物与基因的相互作用，克隆砷相关基因，利用生物信息学技术分析克隆基因。
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