综合类概括大意与完成句子

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读中活动
while reading activities
读后活动
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读前活动
prereading activities

识记词汇：
alga n.水藻（复数 algae）
specimen n.样本，标本
thaw v.解冻
sterilize v.杀菌，消毒
briny adj.咸的，海水的
culture v.培养

A　Significance of Testing Techniques for Sampling Microbes in the Deep Ice Sheet
B　Special Features of Lake Vida
C　Later Expedition on Mars
D　2004 Revisit Planned for Collecting Lake Water Specimens
E　Antarctic Frozen Life Sampled and Revived
F　Accidental Discovery of Ice-sealed Lake Water in Antarctica

读中活动
while reading activities

第三篇　Icy Microbes

1　In ice that has sealed a salty Antarctic lake for more than 2,800 years, scientists have found frozen bacteria and algae that returned to life after thawing. The research may help in the search for life on Mars, which is thought to have subsurface lakes of ice.
2　A research team led by Peter Doran of the University of Illinois at Chicago drilled through
more than 39 feet of ice to collect samples of bacteria and algae. When Doran’s team brought them back and warmed them up a bit, they sprang back to life.
3　Doran said the microbes have been age-dated at 2,800 years old, but even older microbes may live deeper in the ice sheet sealing the lake, and in the briny water below the ice. That deeper ice and the water itself will be cautiously sampled in a later expedition that will test techniques that may one day be used on Mars.
4　Called Lake Vida, the 4.5-square-kilometer body is one of a series of lakes located in the McMurdo Dry Valleys of Antarctica, some 2 ,200 kilometers due south2 of New Zealand. This lake has been known since the 1950s, but people ignored it because they thought it was just a big block of ice. While at the site for other research in the 1990s, Doran and his colleagues sent3 radar signals into the clear ice covering the lake and were surprised to find that 62 feet below there was a pool of liquid water that was about seven times more salty than seawater.
5 That prompted the researchers to return in 1996 with equipment to drill a hole down to within a few feet of the water layer. At the bottom of this hole, researchers harvested specimens of algae and bacteria.
6　The researchers will return in 2004 equipped with instruments that are sterilized. They will then drill through the full 62 feet of ice and sample some of the briny water from the lake for analysis. The water specimen will be cultured to see if it contains life. Specimens from the water are expected to be even older than the life forms extracted from the ice covering.

概括大意
1．Paragraph 2 ________

答案：E

2．Paragraph 3 ________

答案：A

3．Paragraph 4_______

答案：F

4．Paragraph 6________

答案：D

完成句子
5. Scientists ignored Lake Vida because they thought that a lake of ice ________.

答案：B

6．Scientists expect that the life, if found in deeper water below the ice sheet, ________. 

答案：C

7．What the scientists will do in 2004 ________.

答案：E

8．The salt concentration in the liquid water of Lake Vida ________.

答案：A

读后活动
after reading activities

卫生类阅读判断
一、划出句子结构
二、查看中文释义
三、查找背景知识

读前活动
prereading activities
读中活动
while reading activities
读后活动
after reading activities

读前活动
prereading activities

识记词汇：
bump n．隆块，隆起
spiral adj．螺旋形的
probe n．探测器
floppyadj．松软的
floppy disk软（磁）盘
format n．格式
dye n．染色
permanently adv．永久地

A　Digital Code Has Wide Applications
B　Floppy Disks Are Outdated
C　CDs Are Durable
D　CD's Working Principle Is Explained
E CD-RWs Play Better Than CD-ROMs
F CDs Are of Many Formats

读中活动
while reading activities

第四篇 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.1 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 player2 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 into 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 disk3. 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 invented5 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.

概括大意
1. Paragraphs l & 2 ________

答案：D

2．Paragraph 3 ________

答案：A

3．Paragraph 4 ________

 答案：F

4．Paragraph 5 ________

答案：C

完成句子

5．One advantage of CD-RWs is that they can ________ like floppy disks.

答案：E

6．The author predicts it will not ________ before a new technology is invented for music recording.

答案：B

7．The laser beam-emitting device and the receiver are considered to ________ of a CD player.

答案：C

8. Space probes could not ________ without using digital codes. 

答案：F

读后活动
after reading activities

卫生类阅读判断
一、划出句子结构
二、查看中文释义
三、查找背景知识

读前活动
prereading activities
读中活动
while reading activities
读后活动
after reading activities

读前活动
prereading activities

识记词汇：
LED = light-emitting diode发光二极管
obsolete adj．过时的，被淘汰的
flashlight n．手电筒
architectural adj．建筑的
quantum n．量子
crystal n．晶体
batch n．一批
vibrant adj．（颜色）鲜明的
polyurethane n．聚亚安酯
lumpy adj．粗糙的

A　LED Lighting Is Not Mature
B　LED Lighting Will Replace Traditional Lighting
C　Almost Everything Could Be the Main Light Source in the Future
D　LED Lighting Has Many Advantages
E　Bowers Made an Unexpected Discovery
F　LED Light Bulbs Look Lumpy

读中活动
while reading activities

第五篇 LED Lighting

1　An accidental discovery announced recently has taken LED lighting to a new level, suggesting it could soon offer a cheaper, longer-lasting alternative to the traditional light bulb. The breakthrough adds to a growing trend that is likely to eventually make Thomas Edison's bright invention1 obsolete. LEDs are already used in traffic lights, flashlights, and architectural lighting. They are flexible and operate less expensively than traditional lighting.
2　Michael Bowers, a graduate student2 at Vanderbilt University, was just trying to make really small quantum dots, which are crystals generally only a few nanometers big. Quantum dots contain anywhere from 100 to 1,000 electrons3. They're easily excited bundles of energy, and the smaller they are, the more excited they get. Each dot in Bowers' particular batch was exceptionally small, containing only 33 or 34 pairs of atoms.
3　When you shine a light on quantum dots or apply electricity to them, they react by producing their own light, normally a bright, vibrant color. But when Bowers shined a laser on his batch of dots, something unexpected happened. He was surprised when a white glow covered the table. The quantum dots were supposed to emit blue light4, but instead they were giving off a beautiful white glow.
4　Then Bowers and another student got the idea to stir the dots into polyurethane and coat a blue LED light bulb with the mix. The lumpy bulb wasn't pretty, but it produced white light singular to a regular light bulb.
5　LEDs produce twice as much light as a regular 60 watt bulb and bum for over 50,000 hours. The Department of Energy estimates LED lighting could reduce U. S. energy consumption for lighting by 29 percent by 2025. LEDs don't emit heat, so they're also more energy efficient. And they're much harder to break.
6　Quantum dot mixtures could be painted on just about anything5 and electrically excited
to produce a rainbow of colors, including white. The main light source of the future will almost surely not be a bulb. It might be a table, a wall, or even a fork.

概括大意
1．Paragraph l ________

 答案：B

2．Paragraph 3 ________ 

答案：E

3．Paragraph 5 ________

答案：D

4．Paragraph 6 ________

答案：C

完成句子

5．Unlike traditional lighting, LEDs do not give out heat so ________.

 答案：F

6．Edison's bright invention is likely to be outdated because ________. 

答案：A

7．Something unexpected happened during Bower's experiment when ________.

答案：B

8．Over one quarter of energy consumption for lighting could be saved by 2025 if ________.

答案：C

读后活动
after reading activities

卫生类阅读判断
一、划出句子结构
二、查看中文释义
三、查找背景知识