在下列物质中选择相应的序号填空：
①甲烷 ②乙烯 ③甲苯 ④1-丁醇 ⑤乙酸乙酯 ⑥甘氨酸
Ⅰ．分子结构为正四面体的是 ；Ⅱ．能发生水解反应的是 ；
Ⅲ．能与溴水反应并使其褪色的是 ；Ⅳ．与酸或碱都能反应生成盐的是 ；
Ⅴ．能发生消去反应的是 ；
(共5分)I ① II ⑤ III ② IV ⑥ Ⅴ ④
题目分析：Ⅰ．分子结构为正四面体的是甲烷，答案选①；
Ⅱ．能发生水解反应的是乙酸乙酯，答案选⑤；
Ⅲ．能与溴水反应并使其褪色的是乙烯；
Ⅳ．与酸或碱都能反应生成盐的是甘氨酸，答案选⑥；
Ⅴ．能发生消去反应的是1－丁醇，答案选④。
点评：该题是常识性知识的考查，侧重对基础知识的巩固和训练，难度不大。该题的关键是熟练记住常见有机物的结构和性质，特别是分子中含有的官能团，有利于培养学生的应试能力，提高学生的学习效率。
Cities with high levels of homeownership—in the range of 75%, like Detroit and St. Louis—had on average considerably lower levels of economic activity and much lower wages and incomes. Far too many people in financial problems are trapped in homes they can’t sell, unable to move on to new centers of opportunity. The cities and regions with the lowest levels of homeownership—in the range of 55% to 60% like Los Angeles and New York—had healthier economies and higher incomes. They also had higher levels of happiness and well-being. I was shocked to read these interesting points that Richard Florida made in his recent article. Let me try to understand. The people in Detroit and St. Louis are less happy than the people in New York, and Los Angeles. And, the reason is because of homeownership rates? First, to compare them to New York City (the economic capital of the world), Los Angeles (the entertainment capital of the world) seems unfair. Most people in almost any other city in the world might be less happy! Next, let’s try a different way of determining whether renters are happier than homeowners. Why don’t we ask them? Fannie Mae’s National Housing Survey 2010 reported: 75% of current renters believe owning a home makes more sense. 67% plan to buy a home at some point in the future. When they asked current renters for the major reason to buy a house, these were their answers (they could pick several answers): 78% said it was a good place to raise children. 75% said because they would feel safe. 70% said because you have control of your own space. If you believe renters are happier, you would also have to believe the majority enjoy living in a less safe environment, which wouldn’t be a good place to raise children and would be a place where they have less control of their space. 小题1:Which of the following is a fact?
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