1.重点:学会比较亿以内数的大小。能把整万的数改写用万作单位的数。
2.难点:学会比较位数相同亿以内数的大小。能正确地省略万后面的尾数写出它的近似数。
3.关键:以比较万以内数为基础,把个级比较方法推广到万级,能正确比较亿以内数的大小。把生活中的某些镜头带到学生面前,由果到因,让学生体会近似值在社会生活中的实际应用。
要说搜集句子,首先要有一个坚强的后盾,那么这些后盾从哪里来呢?
这要看你需要什么句子,如果是找每一段开篇点题的句子,最好还是找一些文学性比较强的东西,比如说一些给白领看的经济类文章,我们经常提到了的[经济学人].The.Economist.就属此类。要想寻找经济学家的话最好还是去verycd这个网站http://www.verycd.com/topics/2727001/ 这里就是一个很好的选择。比如说无老师就从2008年11月15日这一期的第12页找到了一个很好的句子,很适合当文章的开头。Asked what China will do to rescue the world from financial turmoil, its officials these days have a boilerplate answer:its greatest contribution will be to keep its own economy running smoothly.我们把它放在Do you agree or disagree with the following statement? Many teachers assign homework to students every day. Do you think that daily homework is necessary for students? Use specific reasons and details to support your answer.这个题目之下,就可以改写成Asked what teachers will do to improve their students, the response in high schools have a boilerplate answer:the greatest contribution of homework will be to keep its their students appreciating their knowledge entirely.
那么我们提炼一下Asked what …… will do to ……, the response in …… have a boilerplate answer:the greatest contribution of …… will be to keep its their …….就是一个十分优秀的作文开头模板。
我们也可以从同样是2008年11月15日这一期的120页找到Further evidence of emerging markets’ potential comes from the experience of Britain’s AstraZeneca in China.这一句只要稍加修改就可以变成一个非常优秀的2-4段的段落开头,首先把他模板化Further evidence of …… comes from the experience of …… in …….然后再加入一点倒装句式来证明我们的文学水平Not only does ……come from the experience of …… in ……., but (also evidence of ……subsequently(further prove……这样一个优秀的论证段的段首句模板就完成了。
至于例子的模板,那么就是新闻的天下了,我们仍然可以在《经济学人The.Economist》里面寻找。比如说找到了这么一句话South Korea’s capital city now has been named their most favored travel destination two years in row, according to the report, as 11.4 percent of the Chinese, 9.8 percent of the Japanese, and an overwhelming 20.0 percent of the Thai expressed their preference for Seoul, toppling cities like Tokyo, Paris and Honolulu in the survey. 这里面我们就可以把这个句子直接提炼为模板…… now has been named their most favored …… two years in row, according to the report, as 11.4 percent of the ……, 9.8 percent of the ……, and an overwhelming 20.0 percent of the …… expressed their preference for ……, toppling cities like …, … and … in the survey.相识的'数字,加上确凿的低点,一切显得都是那么无可辩驳,但是实际上这就是一个模板。
当然我们不肯能每一个句子都是这么长,因此我们可以加入很多For example, Therefore, 所引导的句子来增强文章内部的节奏感,使得读者不会感觉到过于疲惫。
至于末段的模板则是有一些讲究的,但是当无老师看了无数篇作文和《经济学人The.Economist》的文章之后,无老师开始反思我们很多学生写的“ After ruminating over all these factors, ”“It is more advantageous for us to make decision alone,”“As far as I am concerned, I come to the notion that”这类作文结尾,是否是一种符合欧美人思维的文章,因为你只要稍微把经济学人的文章找几篇文章的结尾看一下就会知道,其实这里面绝大多数时候,都是以罗列多方
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