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1、Digital camera(数码相机)The newly invented digital camera is fascinating: you can take pictures without film. You can transfer and exhibit your picture globally in a few seconds through the Internet. The image stored in a hard drive will never wear out like the traditional photos. Digital cameras also s
2、atisfy the impatient photographer by allowing them to view their masterpiece in real time.Unlike the images of traditional cameras formed by chemical reaction, the digital camera works as an image digitizer itself. Its made of CCD (chargecoupled device), a small grid of tiny lightsensitive cells. Wh
3、en struck by light, each cell sends out an electrical signal whose waveform characteristics vary depending on the intensity (强度)of light. The signal from each cell is changed into a digital value and stored in the cameras memory or on an electronic storage medium. A “picture” is reduced to a very lo
4、ng list of numbers waiting to be converted back into visual(视力的；视觉的)form. Processed through a computer, each value becomes a pixel(像素); pixels are reassembled (重装)in the original grid pattern and displayed or printed.The image resolution(分辨率)of a digital camera depends on the CCD.More cells on the C
5、CD mean more pixels on the image, which gives greater detail and higher image resolution. The early digital camera had resolution only up to 400 pixels per image, cost several thousand dollars, and was mainly for business use. Now there are choices for consumers in different price ranges. The variet
6、y of digital cameras has amazed first adapters to buy the products.The digital camera technology is moving very fast. A few months ago, most of the digital cameras were equipped with focus lenses at reasonable prices. With all these inventions and technology advancements, the future of digital camer
7、a is bright, and digital cameras may eventually replace traditional cameras.Questions：1.The second paragraph mainly talks about _.A.how a digital camera worksB.what a pixel is in a digital cameraC.what an electronic storage medium is D.how a traditional camera differs from a digital camera2.Which ad
8、vantage of the digital camera is not mentioned?A.They are equipped with auto focus lenses.B.They can be used without film.C.The prices are acceptable.D.They are easy to carry.3.The underlined word “adapters” probably means_.A.things which are considered fashionableB.people who like to try new invent
9、ionsC.things which are designed for purposes D.people who like to take photos4.We can learn from the passage that _.A.lightsensitive cells decide the quality of picturesB.lightsensitive cells decide the intensity of light signalsC.traditional cameras will eventually disappear in the futureD.printed
10、pictures taken by digital cameras will never wear out.答案1.A2.D3.B4.APeriod OneIntroduction & Vocabulary and Reading.单词识记1._adj.数码的；数字式的2._adv.经常地；总是3._ adj.给人深刻印象的4._ adj.非盈利的5._adv.明智地，合理地6.bowling n. _7.certificated adj. _8.virtual adj. _答案1.digital2.constantly3.impressive4.nonprofit5.sensibly6.保龄
11、球运动7.持有职业培训证书的；有执业资格的8.(通过计算机软件)模拟的，虚拟的.短语天地1._保持势头，没有停滞不前2._想象；梦想3._烧毁4._闹着玩儿地5._预先；事先；提前6.turn away_7.have nothing to do with_8.stay away from_9.run away from_10.warn sb of sth_答案1.never look back2.dream of3.burn down4.for fun5.in advance6.不理睬，拒绝7.与无关8.离开；不在家；外出9.从逃出； 从逃跑10.提醒/警告某人某事.句型搜索1.But loo
12、k_a_little_closer_and_you_will_see that this Senior 3 computer expert has some impressive international connections.信息提取句中的look a little closer and youll see.为祈使句and 句子结构，表示顺承关系。例句仿写快一点，你就能赶上头班车。_2.I strongly recommend that the government ban all Internet cafes as so many teenagers are wasting their
13、 time on games and Internet chatting which have_nothing_to_do_with their schoolwork.信息提取一句中I strongly recommend that the government ban.表明recommend后引导的宾语从句应用(should)动词原形。例句仿写老师劝我们读那部小说。_信息提取二句中短语have nothing to do with.意为“和无关”。例句仿写这个人和银行抢劫案(bank robbery)毫无关系。_答案1.Hurry up and you can catch the first
14、 bus.2.The teacher recommended that we (should) read the novel.The man had nothing to do with the bank robbery.预读理解A.Read the text and do the True (T)or False (F)exercises.1.Yan Nuo spends all day long in front of his computer and doesnt get out of the house much.()2.Because Yan Nuo is a student at
15、Shantou Jinshan School, he doesnt give speeches to university students on computer software.()3.Although he is busy with schoolwork, Yan sometimes spends three hours a day working on his computers.()4.Yan published two books about computer when he was 16.()5.Many teenagers see Yan Nuo as a good example as he makes use of computer properly.()答案1.F2.F3.T4.F5.TB.Fill
