单选题According to the text, incomplete combustion is more likely to occur with gasoline than with an alternative fuel because ______.Athe combustion of gasoline releases photochemical active hydrocarbonsBthe combustion of gasoline embraces an intricate set of reactionsCgasoline molecules have a simple molecular structureDgasoline is composed of small molecules
单选题
According to the text, incomplete combustion is more likely to occur with gasoline than with an alternative fuel because ______.
A
the combustion of gasoline releases photochemical active hydrocarbons
B
the combustion of gasoline embraces an intricate set of reactions
C
gasoline molecules have a simple molecular structure
D
gasoline is composed of small molecules
参考解析
解析：
推断题。文章第二段提到“The combustion of larger molecules, which have multiple carbon-carbon bonds involves a more complex series of reactions. These reactions increase the probability of incomplete combustion and are more likely to release uncombusted and photochemical active hydrocarbon compounds into the atmosphere”，即这些反应会导致不完全燃烧，这里的“these reactions”指的就是a more complex series of reactions，因此B项“汽油的不完全燃烧包括一些列复杂的反应”与原文意思相符，为正确答案。
推断题。文章第二段提到“The combustion of larger molecules, which have multiple carbon-carbon bonds involves a more complex series of reactions. These reactions increase the probability of incomplete combustion and are more likely to release uncombusted and photochemical active hydrocarbon compounds into the atmosphere”，即这些反应会导致不完全燃烧，这里的“these reactions”指的就是a more complex series of reactions，因此B项“汽油的不完全燃烧包括一些列复杂的反应”与原文意思相符，为正确答案。
相关考题：
问答题Practice 2 21世纪是生物技术革命的世纪。然而，在人类还没有充分享用到生物技术发展的成果的时候，由此引发的克隆人问题已经无法回避。近年来，一些科学家和组织公开宣布了克隆人的计划。克隆人正从遥远的幻想日益成为逼近的现实。 一些科学家坦言，世界各地都有一些科学家在进行克隆人的试验。但是应当看到，由于克隆人问题可能带来的复杂后果，世界各国，尤其是生物技术发达的国家，现在大都对此采取明令禁止或者严加限制的态度。
单选题According to the passage, it would appear that most sore throats ______.Arequire an immediate visit to a doctorBrespond quickly to treatment with an antibioticCrarely turn out to be serious illnessesDresult in tonsillitis even when treated
问答题Practice 11 本世纪前20年，是中国走新型工业化道路，全面建设小康社会，加速现代化建设进程的战略机遇期。我们要牢牢把握机遇，利用和保护知识产权，培育和推动企业自主创新能力建设，加快创造和培育中国高科技的自主知识产权和自主品牌的步伐。我们要让全世界知道，中国不是只有价廉物美的纺织品和轻工产品，还有更多体现中华民族聪明才智的自主知识产权高新技术产品和自主品牌。
单选题In this passage about secondary schools, the author is mainly concerned about ______.Aacademic standardsBthe role of specialist teachersCthe training of the individual teachersDthe personal development of pupils
单选题From the passage, we can conclude that owners of home computers ______.Acan order news through wire services instead of subscribing to news in print formBshould be happy because they get news quickly than other peopleClive an easier life because they get news convenientlyDshould be happy the computers will replace other print forms of news
单选题What is the main idea expressed in the passage?AThe uses of a city like Marinnation.BThe inhabitants of a city built in the ocean.CThe construction of an independent city-state.DThe engineering feats needed for building an oceanic city.
单选题The author has written the passage mainly for ______.Ageneral readersBpower brokersCeconomistsDdecision makers
问答题Practice 7 我们宿舍里没有穿衣镜，饭厅门口倒是有一面。每当我穿上一件漂亮的新连衣裙，我就禁不住暗暗地想往镜子里瞧瞧自己。但总是在要去瞧的时候就感到特别不自在而踉跄离去——总是在关键时刻打了退堂鼓。 我就是这么羞怯，简直羞怯得不可救药! 我从小就对自己没有信心，这是问题的根子。这种情绪使我受到一点点表扬都会难为情，使我怎么也说不出一个“不”，字，也使我不敢向父母多要一分钱。此外，这种缺乏信心的情况也影响了我对钢琴的热爱。（《爱梦想的羞怯女孩》——在美）
问答题Practice 10 改革开放以来，中国经济飞速发展，对外贸易成绩显著。中国经济和对外贸易发展的良好局面来之不易，这与我国政府尊重和重视知识产权是分不开的。随着科学技术的发展、知识经济的兴起和经济全球化进程的加快，知识产权的重要性得到了历史性提升。经过二十 多年的努力，中国知识产权事业全面发展，为鼓励自主创新，增强自主研发能力，提高国际竞争力提供了坚实基础和有力保障。