专八

简答题 __________.

参考答案:暂无进入在线模考
total exposure。本题的出题点在depend on处。题干问一个人受空气污染影响的程度取决于有害化学物质的_____ 。讲座中提到The extent to which all individual is harmed by air poHution usually depends on thetotal exposure to the damaging chemicals,故得答案total exposureo