仁爱科普版九年级上册Unit 1 The Changing World Topic 2 Section B 学案（含答案）

Unit 1 Topic 2 Section B
【学习目标】
1.能正确表达对人口数量的提问。
2.能区分increase by与increase to的用法。
3.能用数字中的千分位,百万分位与十亿分位进行表达。
【预习导学】
一、生词速查
1./ p pju le n/ 　　 n.人口,人数
2./ r / 　　n. 俄罗斯→　　n.俄罗斯人
3./ n kri s/ v&n.　　 增加,增大,增多
4./ri t / 　　v. 实现;达到;够得着;到达
二、短语速记
1.增加了　 　
2.发展中国家　 　
3.发达国家 　 　
4.实施;执行　 　
5.采取措施　 　
三、句子速译
1.康康正在报纸上看一篇关于人口的报道。
______________________________________________________________
2.它每年正以八千两百万的速度增加。
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3.哪个国家的人口最多
______________________________________________________________
4.它表明发展中国家人口比发达国家要多,是吗
______________________________________________________________
5.幸运的是,中国已经实施了一些政策来解决人口问题。
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【答案】
一、
1.population
2.Russia　Russian
3.increase
4.reach
二、
1.increase by
2.developing country
3.developed country
4.carry out
5.take measures
三、
1.Kangkang is reading a report on population in the newspaper.
2.It is increasing by 82 million every year.
3.Which country has the largest population
4.It shows that the population in developing countries is larger than that in developed countries, doesn't it
5.Luckily, China has already carried out some policies to solve the population problem.
【合作探究】
任务驱动一 人口问题知多少
对画线部分提问
1.The population in China is over 1.4 billion now.
　　 　　the population in China now
2.The population in China was about 1.4 billion three years ago.
　　　　the population in China three years ago
3.There are about 1.38 billion people in India now.
　　 　　people are there in India now
4.The population in the USA is about 333 million now.
　　 　　the population in the USA now
5.The world has a population of about 7.9 billion now.
　　 　　a population of about 7.9 billion now
任务驱动二 人口是如何“增加的”
用介词by或to填空
1.My income (收入) has increased 　　30% till now.
2.The population is increasing 　　82 million every year.
3.The population of the world has increased 　　about 7.9 billion.
4.The population in our city has increased 　　 300,000.
5.If you work in our department, your salary (薪水) will be increased 　　10%.
任务驱动三 趣味“数字”
用英语写出下列数字
1.100　 　
2.3,000 　 　
3.50,000　 　
4.6,000,000　 　
5.9,000,000,000　 　
◎学法指导:1.读数字时,从右到左看逗号:第一个逗号读thousand;第二个逗号读million;第三个逗号读billion。
2.百位与十位之间,要用and连接;如果百位与个位之间没有十位数,则百位与个位之间记住用and连接。
【答案】
任务驱动一
一、
1.What　is
2.What　was
3.How　many
4.What　is
5.Where　has
任务驱动二
一、
1.by
2.by
3.to
4.by
5.by
任务驱动三
一、
1.one hundred
2.three thousand
3.fifty thousand
4.six million
5.nine billion
【知识超市】
[命题点一]increase by与increase to 　
　　●And it is increasing by 82 million every year.并且它正在以每年八千两百万的数字在增长。
◎观察思考:1.The number of girls is increasing by 20% every year in our school.我们学校女学生的数量正在以每年百分之二十的速度增长。
2.Do you need to increase your income by 15% every month 你需要每个月增加百分之十五的收入吗
3.The number of workers in this factory has increased to 400.这家工厂的工人数量已经增加到了400。
◎用法总结:1.increase by 增加了……,按照多少比例增长,by后跟增长部分。
2.increase to 增加到……,to后跟最后的总量。
对点自测
根据汉语意思,补全英语句子
1.她的运动次数增加到了每周6次。
Her exercising times 　　 　　six times every week.
2.印度人口正在以每年约1%的速度增长。
The population in India is 　　 　　about 1% every year.
3.我们班的男生增加到35个了。
The number of boys in our class has 　　 　　35.
【答案】
1.increase　to
2.increasing　by
3.increased　to
[命题点二]that作指示代词的用法
●It shows that the population in developing countries is larger than that in developed countries, doesn't it 它表明发展中国家的人口比发达国家的要多,是吗
◎观察思考:1.It shows that the weather in Beijing is hotter than that in Kunming in summer.它表明夏季时,北京的天气要比昆明的热。
2.The population in China is larger than that in India.中国人口比印度人口多。
3.The food in the restaurant is more delicious than that at home, isn't it 餐馆里的食物要比家里的更好吃,是吗
◎用法总结:1.指示代词that指代上文中某一物,指代复数时,用those。2.doesn't it “是吗,对吗 ”是反义疑问句的用法。遵循的原则是前肯后否或前否后肯的原则。
对点自测
用指示代词填空
1.These books are thicker than 　　on the shelf.
2.The apple in your hand is redder than 　　on the table.
3.The weather in Xinjiang is different from　　in Hainan.
【答案】
1.those
2.that
3.that
2