Some hepatitis viruses are spread by fecal-oral______often by food handlers and in crowded, unsanitary conditions.

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问题 Some hepatitis viruses are spread by fecal-oral______often by food handlers and in crowded, unsanitary conditions.

选项 A、contact
B、contamination
C、pollution
D、touch

答案B

解析 选项A为“(传染病)接触,接触”;选项B为“污染,污物”;选项C为“污染”,常用于环境污染、大气污染等;选项D为“摸,碰,触觉”。根据题意,此处应填入的词语需含有“污染,污物”之意,故选B。
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