大气污染的主因是企业生产过程中的负外部性,这一特征表现为雾霾对居民健康等造成了严重影响,企业却不愿承担责任,结果社会成本几乎由所有社会成员共担。解决这一难题( )①政府应负起管理责任,推行有效治理雾霾的公共政策②市场要发挥决定性作用,让企业既谋求自身利益又承担社会成本③政府要运用经济手段,对空气质量超标企业进行罚款④企业家应增强社会责任感,建立更全面的污染物排放监控体系
The discussion _______ alive when an interesting topic was brought in.
Because the shop _______, all the T-shirts are sold at half price.
—I’m sorry,but there’s no smoking on this flight. —Oh,I _______ that.Sorry, I won’t again.
—Why did you leave that position? —I _______ a better position at IBM.
—What were you doing when Tony phoned you? —I had just finished my work and _______ to take a shower.