题目

有机物H( )是一种用于合成健脾,祛风,散寒药物的中间体,其合成路线如下:已知:① +H2O(R, 是H或烃基) ② ( 可以是 或 ) 回答下列问题: (1) A含有的官能团是; (2) B的结构简式为; (3) 将下列B→C的多步反应流程图补充完整(标明反应条件):; (4) 由C和D生成E的化学方程式为; (5) 下列说法正确的是;a.物质D的核磁共振氢谱有2组吸收峰;b.物质F可与FeCl3溶液发生显色反应;c.G→H的反应 阅读理解   Education is not an end, but a means to an end.In other words, we do not educate children only for the purpose of educating them.Our purpose is to fit them for life.   In some modern countries it has for some time been fashionable to think that by free education for all-one can solve all the problems of society and build a perfect nation.But we can already see that free education for all is not enough; we find in such countries a far larger number of people with university degree; they refuse to do what they think“low”work; and, in fact, work with hands is thought to be dirty and shameful in such countries.But we have only to think a moment to understand that the work of a completely uneducated farmer is far more important than that of a professor; we can live without education, but we die if we have no food.If no one cleaned our streets and took the rubbish away from our houses, we should get terrible diseases in our towns…   In fact, when we say that all of us must be educated to fit us for life, it means that we must be educated in such a way that, firstly, each of us can do whatever work suited to his brains and ability and, secondly, that we can realize that all jobs are necessary to society, and that is very bad to be ashamed of one's work.Only such a type of education can be considered valuable to society. (1) The writer of the passage thinks that ________. [  ] A. education can settle most of the world's problems B. free education for all probably leads to a perfect world C. free education won't help to solve problems D. all the social problems can't be solved by education (2) The writer wants to prove that ________. [  ] A. our society needs all kinds of jobs B. our society needs free education for all C. a farmer is more important than a professor D. work with hands is the most important (3) The purpose of education is ________. [  ] A. to choose officials for the country B. to prepare children mainly for their future work C. to let everyone receive education fit for him D. to build a perfect world (4) The passage tells us about ________ of the education. [  ] A. the means B. the system C. the value D. the type
化学 试题推荐