问题 填空题

诗句“春蚕到死丝方尽,蜡烛成灰泪始干”常用来形容老师们的无私奉献精神.其实该诗句中也蕴含着许多化学含义,认真思考后请回答:

(1)诗句寓意着发生了______(填“物理”或“化学”)变化;

(2)诗句中“丝”含有的物质是______(填“纤维”、“蛋白质”或“油脂”);

(3)诗句中“灰”是指蜡烛燃烧产生的______等气体以及少量炭粒;

(4)句中“泪”是指______.

答案

(1)蜡烛燃烧能生成水和二氧化碳等新物质,故诗句寓意着发生了化学变化.

(2)诗句中的“丝”含有的物质是蛋白质.

(3)诗句中“灰”是指蜡烛燃烧产生的二氧化碳等气体以及少量炭粒.

(4)诗句中“泪”是指蜡烛受热熔化产生的液态石蜡.

故答案为:(1)化学;(2)蛋白质;(3)CO2;(4)蜡烛受热熔化.

完形填空

One topic is rarely mentioned in all the talk of improving standards in our schools: the almost complete failure of foreign-language teaching. As a French graduate who has taught for more than twenty-five years, I believe I have some idea of why the failure is so total.  21  the faults already found out in the education system as a whole — such as child-centred learning, the “discovery” method, and the low expectations by teachers of pupils — there have been several serious  22  which have a direct effect on language teaching.

The first is the removal from the curriculum (课程) of the thorough teaching of English  23 . Pupils now do not know a verb from a noun, the subject of a sentence from its object, or the difference between the past, present, or future.

Another important error is mixed-ability teaching, or teaching in ability groups so  24  that the most able groups are  25  and are bored while the least able are lost and  26  bored. Strangely enough, few head teachers seem to be in favour of mixed-ability school football teams.

Progress depends on memory, and pupils start to forget immediately they stop having 27  lessons. This is why many people who attended French lessons at school, even those who got good grades, have  28  it a few years later. Because they never need it, they do not practice it.

Most American schools have accepted what is inevitable and  29  modern languages, even Spanish, from the curriculum. Perhaps it is time for Britain to do the same, and stop  30  resources on a subject which few pupils want or need.

21. A. Due to                 B. In addition to       C. Instead of            D. In spite of

22. A. errors                  B. situations             C. systems               D. methods

23. A. vocabulary           B. culture                C. grammar             D. literature

24. A. wide                    B. similar                C. separate               D. unique

25. A. kept out               B. turned down        C. held back            D. left behind

26. A. surprisingly          B. individually         C. equally                D. hardly

27. A. extra                   B. traditional           C. basic                   D. regular

28. A. needed                 B. forgotten             C. practised             D. left

29. A. restored               B. absorbed             C. prohibited           D. withdrawn

30. A. wasting                B. focusing              C. exploiting            D. sharing

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