I. Asking questions
Whether staying at home or traveling, eating, wearing and living, we can't live without the telephone, which plays an important role in our life. So this time I'm going to make an in-depth exploration of the telephone.
Two. Investigation plan
1. Conduct various surveys: survey family and friends, interview in the street, and get people's opinions on the phone;
2. Check the information on the Internet and have an accurate understanding of the telephone.
3. Summarize the survey information;
Three. interview
My neighbor's aunt said that mobile phones are widely used now, so she can watch TV, listen to the radio and surf the Internet, which is of great help to her life, so she has several mobile phones to express her approval.
Grandpa Liu downstairs said that the mobile phone is too troublesome and should be recharged all the time. He had to stare at the screen for a long time when he was on the phone. After reading it, my eyes are uncomfortable and I don't like mobile phones.
Four. Telephone price
Do students usually call their parents? In your impression, how much does a phone call usually cost?
Some students say it costs a few dollars, while others say a few cents is enough. So what factors do you think are related to the phone bill? 1: call duration. 2. Long-distance calls are more expensive.
3.IC phone is more expensive than home phone. Mobile phones also seem to be more expensive. .
1. Telephone charging standard
Tariff category rate
0.20 yuan for the first 3 minutes in the area, and then 0. 10 yuan/minute (less than 1 minute is 1 minute, the same below).
Interregional 0.45 yuan/minute
Domestic long-distance call is 0.07 yuan /6 seconds (less than 6 seconds is counted as 6 seconds, the same below).
International call 0.80 yuan /6 seconds
Hong Kong, Macao and Taiwan 0.20 yuan /6 seconds
2. Other charging standards
Mobile phone, PHS, IC phone, IP phone, coin phone, magnetic card phone. How much are these phones?
Telephone category tariff standard (domestic long distance)
Pay phone 0.70 yuan/minute
IP phone 0.30 yuan/minute
IC phone 0.70 yuan/minute
Mobile phone (GSM) 0.07 yuan /6 seconds
Verb (abbreviation for verb) phone number setting
This seems to have nothing to do with the topic at first glance, but it is closely related to mathematics.
The arrangement of telephone numbers consisting of 10 Arabic numerals (0 ~ 9) has strict regularity. Strictly speaking, the number of any telephone in the world is unique.
An international telephone number consists of an international long-distance area code, that is, a country or region code and a domestic internal number. The code of any country or region is different. According to the regulations of the International Telecommunication Union, the code length of countries and regions is 1-3 digits, in which the first digit is the number of nine regions in the world, namely: North America:1; Africa: 2; Europe: 3, 4; South America: 5; South Pacific: 6; Shun: 7; East Asia: 8; Far East and Middle East: 9. So how are the domestic telephones coded in China?
-The International Telecommunication Union (ITU) stipulates that the total length of international telephone numbers should not exceed 12 digits (excluding the international long-distance prefix "00"), and the number in China is 86 digits with a length of 2 digits, so the total length of domestic numbers in China should not exceed 10 digits.
The first number in front of a telephone number is called a prefix. According to the national telephone number coding system, the prefix "0" is used for long-distance direct dial telephone service. Anyone who uses domestic and international direct dial telephones should dial from "0" first. Numbers prefixed with "1" such as 1 10 and19 are service numbers.
Ordinary telephone numbers consist of long-distance area codes and city numbers. The long distance area codes are not equal, and the length is n= 1-4. In this way, the length of the city telephone number =10-n. The bigger the city, the shorter the number n of the area code, and the longer the city number, the greater the local telephone capacity. The former Ministry of Posts and Telecommunications has the following provisions:
—— 1) Beijing —— An area code is "1". The length of the local telephone number should not exceed 9 digits, because the local telephone user number cannot use 1 0, and the final capacity can reach 800 million. At present, the telephone number in Beijing is 8 digits.
——2) In addition to Beijing, there are two area codes, such as Zhongju and Tianjin. The first one is "2". The total length of local telephone numbers is no more than 8 digits, and the final capacity can reach 80 million.
——3) Provincial capitals and big cities have three area codes. The first one is "3, 4, 5, 6, 7, 8, 9" * *. The second digit is the odd number "1, 3,5,7,9" * * *, and the third digit is optional. So 7×5× 10=350 cities can adopt three-digit area codes. The length of local telephone numbers in these cities is no more than 7 digits, and the final capacity can reach 8 million.
——4) Every county and small city has four area codes, the first one is "3, 4, 5, 6, 7, 8, 9" * *. The second digit is the odd number "2,4,6,8,0" * * *, and the third and fourth digits are optional. In this way, 7×5× 10× 10=3500 counties and cities can adopt four-digit area codes. The local telephone capacity is 800,000.
-In this way, the total capacity of long-distance area codes with one, two, three and four digits used in China is1+10+350+3500 = 3861.
-China's first long-distance area code generally has the following rules:
-North China: 3, such as Shijiazhuang: 3 1 1- Northeast China: 4, such as Changchun: 43 1- East China: 5,6, such as Jinan: 53 1- Central South: 7, such as Changsha: 7365438+. In some countries, the internal number is composed of communication company number, long-distance area code and local telephone number, and in some countries, there is only one city, so the internal number is the local telephone number.
4. City telephone number:
The telephone number consists of 10 Arabic numerals (0 ~ 9). The arrangement and use of these 10 numbers have strict regularity, and they are uniformly arranged throughout the country, and no region or unit may change them at will. The first number in front of a phone number is called a prefix. According to the national telephone number coding system, the prefix "0" is used for long-distance direct dial telephone service. Anyone who uses domestic or international direct dial telephone should dial from "0" first; The prefix "1" belongs to special telephone service, such as "1 19" fire alarm; The prefix "9" is specific to mobile communication services, such as "mobile phone", and all telephone numbers with the prefix "9" are used. "2-8" is the local and rural telephone number. In order to distinguish different telephone users, telephone switching technology requires that each telephone can only have a unique number, and the telephone number consists of two parts. The first two or three digits are the office code of the telephone office, and the last few digits are the telephone number of the user. The telephone number code is like a person's last name, and the user's telephone number is like a person's first name. In order to avoid confusion, "the same name and surname" is not allowed on the telephone network. The office numbers of all telephone exchange offices on the Internet cannot be the same, nor can all users in an office be the same.
(1) Meaning of telephone number:
The number in the phone number represents a certain meaning, and we can see where it is called from the phone number. Take Rizhao Netcom with the area code of 0633 as an example: 8 starts with the telephone number of Rizhao City, 6 starts with the telephone number of Juxian County, and Wulian's telephone number is 7 digits, starting with 5, and the last 3 digits represent villages and towns. For example, 544 1 * * is the telephone number of Wang Hu Town, Wulian County, 55 1 1 * *. Each township has its own representative number.
Abstract of intransitive verbs
After this activity, I learned a lot about telephone and people's opinions on telephone. I benefited a lot from this activity.