自主学习任务单
本课课文内容：
The evolution of video and sound devices
Early history of TV
The first public TV broadcasts were made in the USA in 1925. Later, in 1928, the first long-distance TV broadcast was made between the UK and the USA. Regular public broadcasting followed shortly afterwards, first beginning on 11 May 1928 in New York and on 20 August 1929 in London.
Many different people contributed to the development of TV. Most early TV broadcasts were made using a system developed by John Logie Baird in the UK. However, his system was very primitive and had many drawbacks.
An American, Philo Farnsworth, made important breakthroughs in the development of TV in the late 1920s and early 1930s. Modern TVs use many of the principles first discovered by Farnsworth.
John Logie Baird constructed the first colour TV in 1928, but it was not until 1938 that the first colour TV programme was broadcast. It took more than two decades, though, until 1951, for regular colour TV broadcasts to begin in the USA. Regular colour TV broadcasts were delayed in the UK until 1967. However, within a short time nearly all TV broadcasts were made in colour, and within five years more colour TVs than black-and-white TVs were being used.
The modern age: satellite TV
Satellites TV used to broadcast TV beginning in 1962. Satellites allow TV to be broadcast live over vast distances, with everyone receiving the same broadcast at the same time. They also make TV accessible to people who live far away from cities, and satellite dishes can often be seen distributed throughout the countryside and remote areas. Of course, only a small percentage of people own satellite dishes. However, most people still benefit from satellite TV, as local TV companies broadcast the signals they get from satellite receivers to the population living nearby.
Early history of sound recorders
It all began in 1877, when Thomas Edison made the first recording of a human voice on his invention, the record player. Early record players used round tubes to record on. However, in 1887 Emile Berliner, a German living in the USA, invented a record player that used discs as alternatives to tubes, and so the modern record player was born. The first record players had to be wound up by hand and only played records that were two minutes long.
Times surely have changed!
Sound and video recorders
In 1928, the first tape recorders used to copy sound were made in Germany. Most early recorders employed steel tape to record in, which made them heavy and difficult to use, or paper tape, which was easier to use but often broke. It was not until the early 1950s that most tape recorders began using plastic tape as they do today. Meanwhile, electrical components eventually became so small that, by the late 1960s, portable cassette players were developed, along with video recorders which were used by TV stations. By the late 1970s, video recorders small and cheap enough for home use were introduced.
Sound and video go digital
In 1982, the first CDs were made available. CDs are often used for storing and playing music because they have a much better sound quality than traditional records and cassettes. In 1993, the VCD was born, and in 1995, the DVD was invented. The DVD is now the standard for recording and playing back video.
The future
With the development of digital technology, sound and video can now be stored on a PC, on the Internet, or using some form of portable storage. This will soon make records, cassette recorders, CDs, DVDs and even TVs things of the past. Technology is now changing faster than most people can keep pace with. Who can foresee what the future will bring?
 
自主学习任务单
1. Sum-up
    The (1)________ public TV broadcasts were made in 1925. Three years (2)______, there was long-distance TV broadcast, (3)__________ by regular public broadcasting first in New York and the next year in London. Many people (4)___________ to the development of TV. John Baird (5) __________ the first color TV in 1928. But it was not until 1938 that the first color TV programme was (6)_____________. Satellites were used to broadcast TV in 1962, and now many people get information from satellite TV.
The (7)________ of sound and recorders started with Thomas Edison’s first (8)__________of a human voice, and then moved on to different kind of tape recorders, and the first CDs were made (9)_____________ in the 1980s. Soon DVDs and TVs will become the past things. Who can foresee what the future will bring?
2. Reading comprehension: locate the answer as soon as possible.
A
（2017全国卷2）In the coming months, we are bringing together artists from all over the globe, to enjoy speaking Shakespeare’s plays in their own language, in our globe, within the architecture Shakespeare wrote for. Please come and join us.
National Theatre of China   Beijing | Chinese
This great occasion(盛会) will be the national theatre of china’s first visit to the UK. The company’s productions show the new face of 21^st century Chinese theatre. This production of Shakespeare’s Richard III will be directed by the National’s Associate Director, Wang Xiaoying.
Date & Time: Saturday 28 April,2.30pm&Sunday 29 April,1.30pm&6.30pm
Marjanishvili Theatre   Tbilisi l Georgian
One of the most famous theatres in Georgia, the Marjanishvili, founded in 1928, appears regularly at theatre festivals all over the worlD. This new production of As You Like It is helmed（指导）by the company’s Artistic Director Levan Tsuladze.
Date & Time :Friday 18May,2.30pm&Sunday 19May,7.30pm
Deafinitely Theatre  London l British Sign  Language （BSL）
By translating the rich and humourous text of Love’s Labour’s Lost into the physical language of BSL, Deafinitely Theatre creates a new interpretation of Shakespeare’s comedy and aims to build a bridge between deaf and hearing worlds by performing to both groups as one audience.
Date & Time: Tuesday 22 May,2.30pm&Wednesday 23 May,7.30pm
Habima National Theatre Tel Aviv l Hebrew
The Habima is the centre of Hebrew-language theatre worldwide, Founded in Moscow after the 1905 revolution, the company eventually settled in Tel Aviv in the late 1920s, Since 1958,they have been recognized as the national theatre of Israel. This production of Shakespeare’s The Merchant of Venice marks their first visit to the UK.
Date & Time: Monday 28May,7.30&Tuesday 29 May,7.30pm
(1) Which play will be performed by the National Theatre of China?
A. Richard Ⅲ.                 B. Lover’s Labour’s Lost
C. As You Like It               D. The merchant of Venice
(2) What is special about Deafinitely Theatre?
A. It has two groups of actors     B. It is the leading theatre in London
C. It performs plays in BSL       D. It is good at producing comedies
(3) When can you see a play in Hebrew?
A. On Saturday 28 April.          B. On Sunday 29 April
C. On Tuesday 22 May.         D. On Tuesday 29 May
B
(2018天津)Fire Prevention Information
The University of Adelaide employs a full-time staff of fire prevention professionals. They inspect all campus buildings and test and maintain all sprinkler(喷水灭火装置）systems fire alarms and fire  extinguishers (灭火器). They also provide educational programs on fire safety in the residence hall. Whenever you move to a new area, you should locate the fire alarm pull stations and the two exits nearest your room.
Fire Alarms
The floors of all campus buildings are equipped with manual(手动的）fire alarm systems which include fire alarm pull stations and pipes. Most are also equipped with automatic fire alarm systems consisting of heat detectors, smoke detectors and sprinklers. For your safety, never tamper with(胡乱摆弄）these systems. False fire alarms are illegal and may lead to imprisonment.
Fire Drills
A fire drill will be conducted in your residence hall every semester. During a fire drill, please do the following:
·Take your room key and ID, close and lock the door to your room.
·Exit immediately from the nearest emergency exit do not use a lift.
·Meet outside of your residence hall and wait for further instructions.
Fire Extinguishers
Fire extinguishers are located on each floor and in each apartment. Use a fire extinguisher only if you have been trained to do so. Irresponsible use of a fire extinguisher can create a dangerous situation for other residents and could result in damage to personal property.
Misuse of a fire extinguisher will result in fines.
Smoke Detector
A smoke detector is on the ceiling in your room. Some buildings also have heat detectors on the ceilings. Do the following to ensure the safe operation of your smoke detector:
·If your smoke detector is working properly, the red light should be on. If the red light is not blinking（闪动），contact residence hall staff immediately.
·Do not cover or block your smoke detector in any way.
·If a smoke detector sets off an alarm and there is no fire or smoke, inform your hall staff.
(4) What is the main duty of the fire prevention professionals?
A. To provide part-time jobs for students.            
B. To lead the students to the nearest exits.
C. To check and maintain fire prevention equipment.   
D. To train teachers to be fire prevention professionals.
(5) What do the automatic fire alarm systems include?
A. Pipes and smoke detectors.        B. Smoke detectors and sprinklers.
C. Fire alarm pull stations and pipes.   D. Sprinklers and fire alarm pull stations
(6) In a fire drill, the students should ________.
A. rush quickly to a lift                B. gather at the nearest exit.
C. shut the door and leave at once        D. wait for instructions in the hall
(7) What do we know about the use of fire extinguishers?
A. Using them wrongly results in punishment.     
B. Irresponsible use of them can damage them.
C. Improper use of them can destroy the apartment. 
D. Using them without a trainer present is forbidden.
(8) To ensure the safe operation of the smoke detector, one should_________.
A. contact the hall staff regularly             B. cover the things that burn easily
C. start the smoke detector in a fire           D. make certain the red light is working
3. Preview the vocabulary:  Find out the phrases in the text and write them down.
(1) 和……保持联系    ____________      (2) 为电视的发展做出了贡献   ____________
(3) 做出了重大突破  ____________        (4) 在二十世纪二十年代末     ____________
(5) 让直播电视成为可能 ____________     (6) 同时                     ____________
(7) 生活在遥远的地方  ____________      (8) 使得人们能看到电视       ____________
(9) 受益于         ____________         (10) 手工绕起来              ____________
(11) 随着……发展     ____________      (12) 远距离                  ____________
(13) 发送电子信号     ____________      (14) 事实上　　　　　　　　　＿＿＿＿＿＿
 
 
1. Sum up： first; later; followed; contributed; developed; broadcast; history; recording; available
2. Reading comprehension: 1—3  ACD  4—8 CBCAD
3. Previewing:
1. keep in touch with     2. contribute to the development of TV  
3. make important breakthroughs   4. in the late 1920s          
5. allow TV to be broadcast live    6. at the same time            
7. live far away    8. make TV accessible to people  
9. benefit from      10. be wound up by hand       
11. with the development of      12. over a long distance        
13. send electrical signals   14. in truth