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Questions 26 to 30 are based on the following passage:
There’s simple premise behind what Larry Myers does for a living: If you can smell it, you can find it.
Myers is the founder of Auburn University’s Institute for Biological Detection Systems, the main task of which is to chase the ultimate in detection devices-an artificial nose.
For now, the subject of their research is little more than a stack of gleaming chips tucked away in a laboratory drawer. But soon, such a tool could be hanging from the belts of police, arson（纵火）investigators and food-safety inspectors.
The technology that are working on would suggest quite reasonable that, within three to five years, we’ll have some workable sensors ready to use. Such devices might find wide use in places that attract terrorists. Polices could detect drugs, bodies and bombs hidden in cars, while food inspectors could easily test food and water for contamination.
The implications for revolutionary advances in public safety and the food industry are astonishing. But so, too are the possibilities for abuse: Such machines could determine whether a woman is ovulating (排卵), without a physical exam-or even her knowledge.
One of the traditional protectors of American liberty is that it has been impossible I search everyone That’s getting not to be the case.
Artificial biosensors created at Auburn work totally differently from anything ever seen before. Aroma Scan, for example, is a desktop machine based on a bank of chips sensitive to specific chemicals that evaporate into the air. As air is sucked into the machine, chemicals pass over the sensor surfaces and produce cha，
www.jiaoxue51.comnges in the electrical current flowing through them. Those current changes are logged into a computer that sorts out odors based on their electrical signatures.
Myers says they expect to load a singled fingernail-size chip with thousands of odor receptors (感受器), enough to create a sensor that’s nearly as sensitive as a dog’s nose.
26. Which of the following is within the capacity of artificial nose being developed?
Questions 26 to 30 are based on the following passage:
There’s simple premise behind what Larry Myers does for a living: If you can smell it, you can find it.
Myers is the founder of Auburn University’s Institute for Biological Detection Systems, the main task of which is to chase the ultimate in detection devices-an artificial nose.
For now, the subject of their research is little more than a stack of gleaming chips tucked away in a laboratory drawer. But soon, such a tool could be hanging from the belts of police, arson（纵火）investigators and food-safety inspectors.
The technology that are working on would suggest quite reasonable that, within three to five years, we’ll have&n
bsp;some workable sensors ready to use. Such devices might find wide use in places that attract terrorists. Polices could detect drugs, bodies and bombs hidden in cars, while food inspectors could easily test food and water for contamination.
The implications for revolutionary advances in public safety and the food industry are astonishing. But so, too are the possibilities for abuse: Such machines could determine whether a woman is ovulating (排卵), without a physical exam-or even her knowle，
www.jiaoxue51.comdge.
One of the traditional protectors of American liberty is that it has been impossible I search everyone That’s getting not to be the case.
Artificial biosensors created at Auburn work totally differently from anything ever seen before. Aroma Scan, for example, is a desktop machine based on a bank of chips sensitive to specific chemicals that evaporate into the air. As air is sucked into the machine, chemicals pass over the sensor surfaces and produce changes in the electrical current flowing through them. Those current changes are logged into a computer that sorts out odors based on their electrical signatures.
Myers says they expect to load a singled fingernail-size chip with thousands of odor receptors (感受器), enough to create a sensor that’s nearly as sensitive as a dog’s nose.
26. Which of the following is within the capacity of artificial nose being developed?
A) Performing physical examinations.
B) Locating places and water contamination.
C) Detecting drugs and water contamination.
D) Monitoring food processing.
27. A potential problem which might be caused by the use of an artificial nose is ________.
A) negligence of public safety
B) an abuse of personal freedom
C) a hazard to physical health
D) a threat to individual privacy
28. The world "logged" (line 4, Para.7) must probably means "___________".
A) preset
B) entered
C) processed
D) simulated
29. To produce artificial noses for practical use, it is essential ___________.
A) to develop microchips with thousands of odor receptors
B) to invent chips sensitive to various chemicals
C) to design a computer program to sort out smells
D) to find chemicals that can alter&nb，
www.jiaoxue51.comsp;the electrical current passing through
30. The author’s attitude towards Larry Myers’ work is _______________.
A) cautious
B) approving
C) suspicious
D) overenthusiastic.[/quote]
关键句型
17． "cannot…too…"结构,"cannot…too…"意为"It is impossible to overdo…"或者，即"无论怎样……也不算过分"。"not"可换用"hardly"，"scarcely"等，"too"可换用"enough"，"sufficient"等
You cannot be too careful.
18． "否定+but "结构，在否定词后面的"but"，具有"which not"，"who not"，"that not"，等等否定意义，构成前后的双重否定。可译成"没有……不是"或"……都……"等
Nothing is so bad but it might have been worse.
19． "否定+until (till)"结构，在否定词"no"，"not"，"never"，"little"，"few"，"seldom"等的后边所接用的"until/till"，多数情况下译为"直到……才……"，"要……才……"，把否定译为肯定。
Nobody knows what he can do till he has tried.
20． "not so…but"和"not such a …but"结构，这两个结构和"否定+but"的结构差不多，不同之点是这两个结构中的"but"是含有"that…not"意味的连续词，表示程度。可译为"还没有……到不能做……
的程度"，"并不是……不……"，"无论怎样……也不是不能……"等。
答案和译文
26. A 27. D 28. A 29. C 30. D
译文
劳瑞·麦尔斯谋生的职业的背后有一个简单前提：如果你能嗅出它，你就能找到它。
麦尔斯是奥伯恩大学生物探测系统研究所的创建人，该所的主要任务研制高级的探测装置——人工鼻。
目前他们研究的仅是实验室抽屉里的一堆闪光的芯片。但不久，这样的工具就会挂在警察、纵火调查员和食品安全检查员的腰带上。
他们正在研究的技术充分表明：三、五年内我们就会用上一些可工作的传感器。这样的装置可广泛用于恐怖分子感兴趣的地方。警察能查出藏在汽车里的毒pin、尸体和炸dan，而食品检查员可很容易地检测出被污染的食品和水。
在公共安全和食品工业方面，这个革命性的进步影响惊人。但是，它被滥用的可能性也惊人：在不经体检——甚本人不知道的情况下，这种仪器可测定妇女是否排卵。
美国自由的传统保证之一就是不能调查每个人。但这种情况渐渐有所改变。
奥伯恩大学发明的人工生物传感器的工作完全不同于我们见过的任何东西。例如，气味扫描仪是一台有很多芯片的桌面仪，对蒸发到空中的特殊化学物质很敏感。当空气被吸入仪器，化学物质随之通过传感器的表面，使通过传感器的电流发生变化。这些电流变化被录入计算机，计算机就根据电子信号辨别出气味来。
麦尔斯说，他们希望在一个指甲大小的芯片上安装数千个气味感受器，造出足以与狗鼻子几乎一样敏感的传感器。
，
希望
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