大工19春《外贸函电》在线作业1学习资料带答案

第一单元 大数的认识

第一课时 亿以内数的认识

教学目标：

1.认识计数单位“万”“十万”“百万”“千万”和“亿”，知道亿是个大数；知道亿以内各个计数单位的名称和相邻两个单位之间的关系，知道数级、数位。

2．掌握数位顺序，能够根据数级正确地读出亿以内的数。

3．体会大数在生活中的广泛应用，培养学生在实际生活中寻找数学信息的意识和能力。

教学重难点：掌握数位顺序，能够根据数级正确地读出亿以内的数。

教学课型：新授课

教学方法：合作探究

教学准备：多媒体课件。

教学过程：

一、知识链接：

1．我们以前都认识过哪些数？

2．数数：1）从689一个一个的数到712。

2）从420一十一十的数到540。

3）从910一十一十的数到1000。

4）从200一百一百的数到1000。

3．在生活中你见到过哪些比较大的数？

4．出示图片：

在日常生活和生产中，我们经常用到比万大的数。北京市人口：13819000人,请学生试着读一读。

5．揭示课题：这节课我们就来研究更大的数，板书课题：亿以内数的认识

出示学习目标：

1．认识计数单位“万”“十万”“百万”“千万”和“亿”，知道亿是个大数；

2．知道亿以内各个计数单位的名称和相邻两个单位之间的关系，知道数级、数位。

3．掌握数位顺序，能够根据数级正确地读出亿以内的数。

二、指导自学：

自学指导

请认真看P.3--4的内容，思考：

1．提问：从刚才一边拨珠、一边数数的过程中，谁发现相邻的两个计数单位之间有什么关系？

2．什么是计数单位？

3．什么叫数位？数位是从哪边数起的？数位有哪些？

4．什么是数级？有哪几个级？几个数位是一级？

5．分钟后，比谁能回答出上述问题。

三、学生自学

1．学生按照自学指导看书，教师巡视，确保人人学得紧张高效。

2．检查自学效果。

（1）回答自学指导的思考：

①提问：从刚才一边拨珠、一边数数的过程中，谁发现相邻的两个计数单位之间有什么关系？

《外贸英语函电》（第⼆版）习题答案

《外贸英语函电》（第⼆版）

习题答案Chapter 1 key to exercises

1. Translate the following terms.

（1）inside address 封内地址

（2）salutation 称呼

（3）complimentary close 结尾敬语

（4）Ref. No. 参考编号

（5）enclosure 附件

（6）P.O.Box 邮箱

（7）postscript 附⾔

（8）full block style 齐头式2. Answer the following questions.

（1）How many formats of business letters do we use today? What are they?Three formats are used in writing business letter. They are full block style, modified block style and indented style.

（2）What are the standard parts of a business letter?There are seven standard parts which includes letterhead, date, inside address, salutation, body of the letter, complimentaryclose and signature.

（3）What kinds of information should be written on an envelop? And what are their positions?The information of the sender and the receiver should be written on an envelop. The information of the sender is at the top-left corner, while the information of the receiver is almost in the middle of the envelop.

外贸英语函电课后习题参考答案

外贸英语函电课后习题参考答案

（For Reference Only）Chapter 1 Business Letter I. Answer the following questions.

1. How many principal parts is a business letter composed of? What are they?

Generally speaking, there are seven principal parts of a standard business letter. They are the

letter head; the date; inside name and address; saluation; the body of a letter(message); the

complimentary close and signature. 2. What are the three main formats of a business letter used today? Which format do youlike best?

There are three main formats of a business letter in use at present: the conventional

indented style; the modern block style and the modified block style.

I like the modern block

style, since it is simple and we can save much time.

3. What is P.S.?

It is postscript, refers to one or more remarks the writer may add to the core or body of the

外贸英语函电课后习题参考答案

外贸英语函电课后习题参考答案

（For Reference Only）Chapter 1 Business Letter

I.Answer the following questions.

1.How many principal parts is a business letter composed of? What are they?

Generally speaking, there are seven principal parts of a standard business letter. They are the letter head; the date; insidename and address; saluation; the body of a letter(message); the complimentary close and signature.

2. What are the three main formats of a business letter used today? Which format do you like best?

There are three main formats of a business letter in use at present: the conventional indented style; the modern block styleand the modified block style. I like the modern block style, since it is simple and we can save much time.

3. What is P.S.?

It is postscript, refers to one or more remarks the writer may add to the core or body of the letter,usually hand-written side byside with or below the signature and enclosure parts, where there is often a large patch of blank space. A postscript can be asentence or a brief paragraph.