A. all of the effects of pollution on the human body B. how pollution can be controlled successfully C. when the atmosphere first became polluted D. how to wash the black snow clean 参考答案:A 答案解析:[试题分析] 本问考查考生对文章细节的了解。 [详细解答] 根据文章的第四段中的There are other possible health dangers from air pollutio
第29题:[单选题] Which business device involves the creation of a new business by two or more companies, often for a limited period of time? A. Multinational enterprise B. International joint venture C. Horizontal merger D. Vertical merger 参考答案:B