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
I hadn't intended to get much from the business I ran the first year, while it ____ so well.
Shopping online can _____ both convenience and choice, but not _____ websites are safe enough for shopping.
---We are leaving on June 15. ---So why not come to spend _____ days with us? I'm serious.
---Have you got used to the Chinese food, Robert? ---Yes. But I don't like _____ when a Chinese host keeps serving me the food I don't like.
—How many people are still leading_____ life under_____ poverty line in the world? —Perhaps one fourth.