Compact Disks
1 If someone says to you your music CDs don't really hold any music on them, and they only have numbers recorded on them, you may not believe it. In fact, he is right in that sound is actually recorded onto the CDs as special numbers - a digital code. The code is pressed onto the CD as bumps on a long spiral track almost five kilometers long. These bumps are an average of 0.5 microns wide
2 A small laser beam shines onto the bumps as the CD turns. The light is reflected back to a receiver that records how the laser light bounces back. This lets the CD player turn the reflected light back into the original code. This means you can hear the original code as music.
3 Digital codes are used with many technologies. E-mail needs these kinds of code numbers. Space probes communicate with their ground station on earth using digital codes. Bar codes are read as digital codes in computer systems. Digital communications with cell phones need digital codes. Weather radios also tune in to specific signals using these codes.
4 There are many types of compact disks. One format is called CD-RWs. They can be recorded on and re-recorded on (rewritten on) as you would do with a floppy disk. Another format is the CD-ROM. The technology for recording on these disks is different from other CDs. These CDs have a dye layer that the CD writer can darken or leave clear. The clear and dark spots are the digital code. CD-ROM stands for Compact Disc - Read Only Memory4. This disk is like a "super" floppy disk that can hold lots of information. One CD-ROM can hold the same amount of data as 500 floppy disks. Information is permanently recorded onto it. Computer games and other programs are considered to be CD-ROMs.
5 CDs were first sold to the public in 1982. These CDs still play well and sound fine. Current CDs are expected to last between 70 to 200 years. Of course, you can make sure your CDs last a long time by taking care of them.
6 Science keeps on developing. It may not be many more years before a completely new technology is invented and introduced to the public for music recording. In the meantime, there is no doubt you will continue to enjoy listening to your favorite music on CDs6 and playing your favorite computer games on CD-ROMs.
練習(xí)：
1.Paragraphs 1 & 2
2.Paragraph 3
3.Paragraph 4
4.Paragraph 5
ADigital code has wide applications.
BFloppy disks are outdated.
CCDs are durable.
DCD's working principle is explained.
ECD-RWs play better than CD-ROMs.
FCDs are of many formats.
5. One advantage of CD-RWs is that they can __________ like floppy disks.
6. The author predicts it will not __________ before a new technology is invented for music recording.
7. The laser beam-emitting device and the receiver are considered to _______ of a CD player.
8. Space probes could not __________ without using digital codes.
A. shine on bumps
B. take many more years
C. be the key parts
D. restore the original code
E. be written on and rewritten on
F. keep contact with their ground station efficiently
題目詳解：
Compact Disks，就是我們很熟悉的CD的全稱，其中compact原意是裝填緊密的；disk, 也可以寫成disc, 意思是扁平的圓盤狀物、磁盤。Compact disk就是激光唱片，或光盤。
接下來，先解前半部分題目，即概括段落大意，我們需要概括1，2，3，4，5段。在閱讀如上段落之前先了解被選答案的大意。
ADigital（數(shù)字的） code（代碼） has wide（廣泛的） applications（應(yīng)用）.
BFloppy（松軟的） disks are outdated（過時的）.
CCDs are durable（經(jīng)久耐用的）.
DCD's working principle（工作原理） is explained（被解釋）.
ECD-RWs（一種光盤的種類） play（播放） better than CD-ROMs.
FCDs are of（具有） many formats（格式）.
閱讀一、二段：
1 If someone（有人） says to you（對你說） your music CDs don't really hold（包含、有） any music on them, and they only have numbers（數(shù)字） recorded（被刻錄下來） on them, you may not believe（相信） it. In fact（事實上）, he is right（正確的） in that （復(fù)合介詞，表示原因，相當于because）sound（聲音） is actually（實際上） recorded onto the CDs as（介詞，作為） special （特殊的）numbers - a digital code（數(shù)碼）. The code is pressed（擠、壓） onto the CD as（像，同義詞like） bumps （凸起部分）on a long （長長的）spiral（螺旋形的） track （軌跡、軌道）almost five kilometers（5公里） long. These bumps are an average（平均的） of 0.5 microns（微米） wide（寬）
2 A small laser（激光） beam （光束）shines （照射）onto the bumps as （當）the CD turns（旋轉(zhuǎn)）. The light is reflected（被反射） back to a receiver（接受器） that（引導(dǎo)定語從句） records（記錄） how the laser light （激光）bounces（彈起） back. This lets the CD player（CD播放機） turn the reflected（被反射的） light back into the original（最初的、原先的） code. This means（意味著） you can hear the original code as music.
分析：經(jīng)過我們逐字逐句的閱讀，可以看出第一、二段主要就是講CD的工作原理。描述得很詳細：聲音以數(shù)碼的形式被刻錄到CD碟片上。要回聽聲音，就得用 CD 放音機，CD 機用激光照射 CD，接收器收和分析從 CD 反射回來的激光波，還原為原來的數(shù)碼，再轉(zhuǎn)換為原來的聲音。所以，我們應(yīng)該選擇D。
閱讀第三段：
Digital codes are used（被用于） with many technologies（技術(shù)）. E-mail needs（需要） these kinds（種類） of code（代碼） numbers. Space（太空、空間） probes（探測器，同義詞explorer） communicate (溝通、聯(lián)絡(luò))with their ground station（地面站） on earth using digital codes. Bar codes（條形碼） are read as digital codes in computer systems（在計算機系統(tǒng)中）. Digital communications（數(shù)碼通訊） with（使用） cell phones （手機）need digital codes. Weather（天氣） radios（無線電） also tune into（轉(zhuǎn)變成） specific（具體的）signals（信號）using these codes.
分析：實際上，本段第一句就是中心：Digital codes are used with many technologies.后面的內(nèi)容是作者例舉了在5個領(lǐng)域中數(shù)碼的具體應(yīng)用：電郵、航天通訊、條碼、手機和天氣預(yù)報。所以這題選擇A，它的表述與主題句的意思完全吻合
閱讀第四段：
There are many types（種類，同義詞kinds） of compact disks. One format(格式) is called CD-RWs. They can be recorded on and re-recorded（反復(fù)被刻錄） on (rewritten on) as（正如） you would do with a floppy disk（軟盤）（這句話說明CD-RW的工作原理和軟盤一樣。）. Another format is the CD-ROM. The technology for recording on these disks is different from other CDs（整句的意思是：用這種光盤存儲數(shù)據(jù)的技術(shù)跟其它的光盤不同。）. These CDs have a dye layer（染色層） that（定語從句） the CD writer（光盤刻錄機） can darken（涂黑） or leave （留出）clear（空白）. The clear and dark spots（點） are the digital code. CD-ROM stands for（代表） Compact Disc - Read Only Memory（是讀存儲光盤的簡稱）. This disk is like（像） a "super"（超級的） floppy disk that can hold（包括、包含） lots of information. One CD-ROM can hold the same amount of data as （和the same構(gòu)成固定搭配，意思和。。。一樣）500 floppy disks（句子意思：一張CD-ROM可以包括相當于500張軟盤所存儲的數(shù)據(jù)）. Information is permanently（永久地） recorded onto it. Computer games and other programs（程序） are considered（被看作） to be CD-ROMs.
分析：別看這段長，事實上大意很容易掌握，開頭第一句就是中心句：There are many types of compact disks。后面就是例舉了兩種常用的 CD 格式 （format）, 一種是 CD-RW，另一種是 CD-ROM.所以，選擇答案F。
閱讀第五段：
CDs were first（首先） sold（被出售） to the public（公眾） in 1982. These CDs still play（播放） well and sound（聽起來） fine. Current （現(xiàn)在、目前）CDs are expected（被期望） to last（延續(xù)） between 70 to 200 years. Of course, you can make sure （確定）your CDs last a long time by（通過，表示方式） taking care of them.
分析：該段比較簡單，用數(shù)字作為對觀點的闡述，大意是：1982年上市的 CD 碟片至今還能使用，其音質(zhì)依舊。現(xiàn)在上市的 CD，更加耐用，如果使用得當，其壽命可達70－200年。選項 C 用了durable 予以概括是很恰當?shù)?，所以，C是答案。
至此為止，前半部分的要求已經(jīng)圓滿完成，接下來，完成后半部分，請注意解題思路：
1． 讀空格前面部分的句子結(jié)構(gòu)， 理解其語意， 找出結(jié)構(gòu)中可以利用的“線索詞”---“特征詞”， “細節(jié)信息詞”，“含有修飾詞的結(jié)構(gòu)”；
2． 利用“線索詞”作為答案線索， 在文章中查找答案相關(guān)句；
3． 對比問題句及答案相關(guān)句的句意， 或?qū)Ρ葐栴}句及答案相關(guān)句的句子結(jié)構(gòu)，句中用詞，對比被選項判斷答案；
我們先理解題干的意思，然后在看備選答案。
5. One advantage（優(yōu)點、優(yōu)勢） of CD-RWs is that （引導(dǎo)表語從句）they can（能夠） __________ like（像） floppy disks（軟盤）.
6. The author（作者） predicts（預(yù)測、預(yù)言） it will not __________ before a new technology（新技術(shù)） is invented（被發(fā)明） for music recording（音樂存儲）.
7. The laser beam-emitting （激光發(fā)射）device（裝置） and the receiver（接受器） are considered（被認為） to _______ of a CD player.
8. Space probes（空間探測器） could not __________ without（不，沒有） using digital codes.
A. shine on bumps（照射在凸起處）
B. take many more years（花費更多年）
C. be the key parts（成為關(guān)鍵部件）
D. restore the original code（存儲原先的代碼）
E. be written on and rewritten on（被寫上并且被重新寫上）
F. keep contact with their ground station efficiently（有效地同他們的地面站保持聯(lián)絡(luò)）
看第5題，找到關(guān)鍵詞，從文章的出處找答案。關(guān)鍵詞：CD-RWs，該詞出現(xiàn)在第四段中：One format is called CD-RWs. They can be recorded on and re-recorded on (rewritten on) as you would do with a floppy disk.所以，我們選擇E。然后你將頭尾連在一起讀讀看，是否通順，語意完整。
One advantage（優(yōu)點、優(yōu)勢） of CD-RWs is that （引導(dǎo)表語從句）they can（能夠）_ be written on and rewritten on __ like（像） floppy disks（軟盤）.
看第6題，在最后一段找到了相關(guān)句子：
It may not be many more years before a completely new technology is invented and introduced（引進） to the public for music recording（音樂存儲）.所以選B。
將頭尾連在一起：
The author predicts it will not __ take many more years _before a new technology is invented for music recording.
讀第7題，關(guān)鍵詞是主語部分：The laser beam-emitting （激光發(fā)射）device（裝置） and the receiver（接受器）出現(xiàn)在第二段中。是說在 CD 機上還原數(shù)碼時依靠的是激光發(fā)射裝置和接收器。由此我們可以推論出激光發(fā)射器和接收器是 CD 機的主要部件。所以C是答案。
將頭尾連在一起：
The laser beam-emitting （激光發(fā)射）device（裝置） and the receiver（接受器） are considered（被認為） to __ be the key parts _ of a CD player.
看第8題，關(guān)鍵詞Space probes，出現(xiàn)在第三段中：Space probes communicate with their ground station on earth using digital codes.所以在剩余答案中選擇F。
將頭尾連在一起：
Space probes（空間探測器） could not _ keep contact with their ground station efficiently _ without（不，沒有） using digital codes.（其中，keep contact with = communicate with
1 If someone says to you your music CDs don't really hold any music on them, and they only have numbers recorded on them, you may not believe it. In fact, he is right in that sound is actually recorded onto the CDs as special numbers - a digital code. The code is pressed onto the CD as bumps on a long spiral track almost five kilometers long. These bumps are an average of 0.5 microns wide
2 A small laser beam shines onto the bumps as the CD turns. The light is reflected back to a receiver that records how the laser light bounces back. This lets the CD player turn the reflected light back into the original code. This means you can hear the original code as music.
3 Digital codes are used with many technologies. E-mail needs these kinds of code numbers. Space probes communicate with their ground station on earth using digital codes. Bar codes are read as digital codes in computer systems. Digital communications with cell phones need digital codes. Weather radios also tune in to specific signals using these codes.
4 There are many types of compact disks. One format is called CD-RWs. They can be recorded on and re-recorded on (rewritten on) as you would do with a floppy disk. Another format is the CD-ROM. The technology for recording on these disks is different from other CDs. These CDs have a dye layer that the CD writer can darken or leave clear. The clear and dark spots are the digital code. CD-ROM stands for Compact Disc - Read Only Memory4. This disk is like a "super" floppy disk that can hold lots of information. One CD-ROM can hold the same amount of data as 500 floppy disks. Information is permanently recorded onto it. Computer games and other programs are considered to be CD-ROMs.
5 CDs were first sold to the public in 1982. These CDs still play well and sound fine. Current CDs are expected to last between 70 to 200 years. Of course, you can make sure your CDs last a long time by taking care of them.
6 Science keeps on developing. It may not be many more years before a completely new technology is invented and introduced to the public for music recording. In the meantime, there is no doubt you will continue to enjoy listening to your favorite music on CDs6 and playing your favorite computer games on CD-ROMs.
練習(xí)：
1.Paragraphs 1 & 2
2.Paragraph 3
3.Paragraph 4
4.Paragraph 5
ADigital code has wide applications.
BFloppy disks are outdated.
CCDs are durable.
DCD's working principle is explained.
ECD-RWs play better than CD-ROMs.
FCDs are of many formats.
5. One advantage of CD-RWs is that they can __________ like floppy disks.
6. The author predicts it will not __________ before a new technology is invented for music recording.
7. The laser beam-emitting device and the receiver are considered to _______ of a CD player.
8. Space probes could not __________ without using digital codes.
A. shine on bumps
B. take many more years
C. be the key parts
D. restore the original code
E. be written on and rewritten on
F. keep contact with their ground station efficiently
題目詳解：
Compact Disks，就是我們很熟悉的CD的全稱，其中compact原意是裝填緊密的；disk, 也可以寫成disc, 意思是扁平的圓盤狀物、磁盤。Compact disk就是激光唱片，或光盤。
接下來，先解前半部分題目，即概括段落大意，我們需要概括1，2，3，4，5段。在閱讀如上段落之前先了解被選答案的大意。
ADigital（數(shù)字的） code（代碼） has wide（廣泛的） applications（應(yīng)用）.
BFloppy（松軟的） disks are outdated（過時的）.
CCDs are durable（經(jīng)久耐用的）.
DCD's working principle（工作原理） is explained（被解釋）.
ECD-RWs（一種光盤的種類） play（播放） better than CD-ROMs.
FCDs are of（具有） many formats（格式）.
閱讀一、二段：
1 If someone（有人） says to you（對你說） your music CDs don't really hold（包含、有） any music on them, and they only have numbers（數(shù)字） recorded（被刻錄下來） on them, you may not believe（相信） it. In fact（事實上）, he is right（正確的） in that （復(fù)合介詞，表示原因，相當于because）sound（聲音） is actually（實際上） recorded onto the CDs as（介詞，作為） special （特殊的）numbers - a digital code（數(shù)碼）. The code is pressed（擠、壓） onto the CD as（像，同義詞like） bumps （凸起部分）on a long （長長的）spiral（螺旋形的） track （軌跡、軌道）almost five kilometers（5公里） long. These bumps are an average（平均的） of 0.5 microns（微米） wide（寬）
2 A small laser（激光） beam （光束）shines （照射）onto the bumps as （當）the CD turns（旋轉(zhuǎn)）. The light is reflected（被反射） back to a receiver（接受器） that（引導(dǎo)定語從句） records（記錄） how the laser light （激光）bounces（彈起） back. This lets the CD player（CD播放機） turn the reflected（被反射的） light back into the original（最初的、原先的） code. This means（意味著） you can hear the original code as music.
分析：經(jīng)過我們逐字逐句的閱讀，可以看出第一、二段主要就是講CD的工作原理。描述得很詳細：聲音以數(shù)碼的形式被刻錄到CD碟片上。要回聽聲音，就得用 CD 放音機，CD 機用激光照射 CD，接收器收和分析從 CD 反射回來的激光波，還原為原來的數(shù)碼，再轉(zhuǎn)換為原來的聲音。所以，我們應(yīng)該選擇D。
閱讀第三段：
Digital codes are used（被用于） with many technologies（技術(shù)）. E-mail needs（需要） these kinds（種類） of code（代碼） numbers. Space（太空、空間） probes（探測器，同義詞explorer） communicate (溝通、聯(lián)絡(luò))with their ground station（地面站） on earth using digital codes. Bar codes（條形碼） are read as digital codes in computer systems（在計算機系統(tǒng)中）. Digital communications（數(shù)碼通訊） with（使用） cell phones （手機）need digital codes. Weather（天氣） radios（無線電） also tune into（轉(zhuǎn)變成） specific（具體的）signals（信號）using these codes.
分析：實際上，本段第一句就是中心：Digital codes are used with many technologies.后面的內(nèi)容是作者例舉了在5個領(lǐng)域中數(shù)碼的具體應(yīng)用：電郵、航天通訊、條碼、手機和天氣預(yù)報。所以這題選擇A，它的表述與主題句的意思完全吻合
閱讀第四段：
There are many types（種類，同義詞kinds） of compact disks. One format(格式) is called CD-RWs. They can be recorded on and re-recorded（反復(fù)被刻錄） on (rewritten on) as（正如） you would do with a floppy disk（軟盤）（這句話說明CD-RW的工作原理和軟盤一樣。）. Another format is the CD-ROM. The technology for recording on these disks is different from other CDs（整句的意思是：用這種光盤存儲數(shù)據(jù)的技術(shù)跟其它的光盤不同。）. These CDs have a dye layer（染色層） that（定語從句） the CD writer（光盤刻錄機） can darken（涂黑） or leave （留出）clear（空白）. The clear and dark spots（點） are the digital code. CD-ROM stands for（代表） Compact Disc - Read Only Memory（是讀存儲光盤的簡稱）. This disk is like（像） a "super"（超級的） floppy disk that can hold（包括、包含） lots of information. One CD-ROM can hold the same amount of data as （和the same構(gòu)成固定搭配，意思和。。。一樣）500 floppy disks（句子意思：一張CD-ROM可以包括相當于500張軟盤所存儲的數(shù)據(jù)）. Information is permanently（永久地） recorded onto it. Computer games and other programs（程序） are considered（被看作） to be CD-ROMs.
分析：別看這段長，事實上大意很容易掌握，開頭第一句就是中心句：There are many types of compact disks。后面就是例舉了兩種常用的 CD 格式 （format）, 一種是 CD-RW，另一種是 CD-ROM.所以，選擇答案F。
閱讀第五段：
CDs were first（首先） sold（被出售） to the public（公眾） in 1982. These CDs still play（播放） well and sound（聽起來） fine. Current （現(xiàn)在、目前）CDs are expected（被期望） to last（延續(xù)） between 70 to 200 years. Of course, you can make sure （確定）your CDs last a long time by（通過，表示方式） taking care of them.
分析：該段比較簡單，用數(shù)字作為對觀點的闡述，大意是：1982年上市的 CD 碟片至今還能使用，其音質(zhì)依舊。現(xiàn)在上市的 CD，更加耐用，如果使用得當，其壽命可達70－200年。選項 C 用了durable 予以概括是很恰當?shù)?，所以，C是答案。
至此為止，前半部分的要求已經(jīng)圓滿完成，接下來，完成后半部分，請注意解題思路：
1． 讀空格前面部分的句子結(jié)構(gòu)， 理解其語意， 找出結(jié)構(gòu)中可以利用的“線索詞”---“特征詞”， “細節(jié)信息詞”，“含有修飾詞的結(jié)構(gòu)”；
2． 利用“線索詞”作為答案線索， 在文章中查找答案相關(guān)句；
3． 對比問題句及答案相關(guān)句的句意， 或?qū)Ρ葐栴}句及答案相關(guān)句的句子結(jié)構(gòu)，句中用詞，對比被選項判斷答案；
我們先理解題干的意思，然后在看備選答案。
5. One advantage（優(yōu)點、優(yōu)勢） of CD-RWs is that （引導(dǎo)表語從句）they can（能夠） __________ like（像） floppy disks（軟盤）.
6. The author（作者） predicts（預(yù)測、預(yù)言） it will not __________ before a new technology（新技術(shù)） is invented（被發(fā)明） for music recording（音樂存儲）.
7. The laser beam-emitting （激光發(fā)射）device（裝置） and the receiver（接受器） are considered（被認為） to _______ of a CD player.
8. Space probes（空間探測器） could not __________ without（不，沒有） using digital codes.
A. shine on bumps（照射在凸起處）
B. take many more years（花費更多年）
C. be the key parts（成為關(guān)鍵部件）
D. restore the original code（存儲原先的代碼）
E. be written on and rewritten on（被寫上并且被重新寫上）
F. keep contact with their ground station efficiently（有效地同他們的地面站保持聯(lián)絡(luò)）
看第5題，找到關(guān)鍵詞，從文章的出處找答案。關(guān)鍵詞：CD-RWs，該詞出現(xiàn)在第四段中：One format is called CD-RWs. They can be recorded on and re-recorded on (rewritten on) as you would do with a floppy disk.所以，我們選擇E。然后你將頭尾連在一起讀讀看，是否通順，語意完整。
One advantage（優(yōu)點、優(yōu)勢） of CD-RWs is that （引導(dǎo)表語從句）they can（能夠）_ be written on and rewritten on __ like（像） floppy disks（軟盤）.
看第6題，在最后一段找到了相關(guān)句子：
It may not be many more years before a completely new technology is invented and introduced（引進） to the public for music recording（音樂存儲）.所以選B。
將頭尾連在一起：
The author predicts it will not __ take many more years _before a new technology is invented for music recording.
讀第7題，關(guān)鍵詞是主語部分：The laser beam-emitting （激光發(fā)射）device（裝置） and the receiver（接受器）出現(xiàn)在第二段中。是說在 CD 機上還原數(shù)碼時依靠的是激光發(fā)射裝置和接收器。由此我們可以推論出激光發(fā)射器和接收器是 CD 機的主要部件。所以C是答案。
將頭尾連在一起：
The laser beam-emitting （激光發(fā)射）device（裝置） and the receiver（接受器） are considered（被認為） to __ be the key parts _ of a CD player.
看第8題，關(guān)鍵詞Space probes，出現(xiàn)在第三段中：Space probes communicate with their ground station on earth using digital codes.所以在剩余答案中選擇F。
將頭尾連在一起：
Space probes（空間探測器） could not _ keep contact with their ground station efficiently _ without（不，沒有） using digital codes.（其中，keep contact with = communicate with