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An Australian-based scientist announced yesterday he had made a step forward in forensic(用于法庭的) DNA testing so that an individual can be identified by a single cell．
Ian Findlay from the Australian Genome Research Facility at the University of Queensland, said current DNA testing required 200 to 500 cells to gain a similar level of accuracy．
“What we have done has brought that down to one cell,” Dr．Findlay said after releasing details of his DNA testing technique at a Sydney conference．
The technology could allow investigators to pick up DNA identities from plastic cards and even build up a complete history of the people who have handled a paper document．
“You’d have to wear a space suit to stop yourself from leaving traces．You can identify cells on the paper, so you can work out where it’s come from and who’s touched it．” he said．
The technique could also be used to trace the thrower of a punch from cells left Behind on the skin of their victim．Even the wearing of latex gloves would not help; small cells can pass through the gloves, and the constant flow of genetic material given off by the human body would leave further evidence．
“we gained a skin cell from a document dating back 30 years and managed to gain a DNA fingerprint．DNA evidence can remain fresh for decades, perhaps even centuries．” Dr．Findlay said．
“The potential for this technology to solve unsolved crimes is great．” he said．
But Dr．Findlay, named scientist of the year in 1998 by the European Society of Human Genetics, said the new testing needed to be scientifically validated, which would take up to five years．
He said, “These are serious consequence taking on technology too early．The public has to be sure that they have the utmost confidence in the security and court systems．”
1．The main advantage of the new technology is that ．
A．a single cell can identify an individual
B．it has brought down the cost of DNA testing
C．a higher level of accuracy can be acquired with a single cell
D．it needs less than 200 cells to gain a certain level of accuracy
2．The underlined word “validated” means “ ” ．
A．confirmed B．imagined C．supposed D．criticized
3．According to Ian Findlay, the new technology can ．
A．help to keep DNA evidence fresh for decades and even centuries
B．make the process of DNA testing much more simplified
C．help to pick up DNA identities more easily
D．be wildly used in five years at most
4．The last paragraph suggests that ．
A．the immediate adopting of the technology may cause mistakes
B．the public have acknowledge the new testing technology
C．it is safe to put the new technology into use now
D．Dr. Findlay is quite sure of his new technology
5．The aim of the passage is to ．
A．praise Ian Findlay for his work
B．report a piece of interesting news
C．inform us of the wide use of DNA testing
D．tell us a recent improvement in DNA testing
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C
A villa (别墅) designed to resist earthquakes with “self-healing” cracks in its walls, thanks to nanotechnology (纳米技术) applications with self-healing polymers (聚合物), is to be built on a Greek mountainside. The villa’s walls will include special particles that turn into a liquid when squeezed (压榨) under pressure, flow into cracks, and then harden to form a solid material.
The NanoManufacturing Institute (NMI), based in Leeds University, will play a key role in an EU project to construct the home by December 2010. The project, called “Intelligent Safe and Secure Buildings” (ISSB) is funded under the EU’s Sixth Framework program. This potentially life-saving scheme is led by German building manufacturer Knauf. The villa will be built in Amphilochia, in western Greece, where Knauf currently runs a manufacturing plant. If the experiment is successful, more tremor-resistant（防震）homes could be built in earthquake zones across the globe. NMI chief executive Professor Terry Wilkins said, “What we’re trying to achieve here is very exciting. We’re looking to use polymers in much tougher situations than ever before on a larger scale.” Monitors contained in the villa’s walls will be able to collect vast amounts of data about the building over time. Wireless sensors will record any stresses and vibrations, as well as temperature, humidity and gas levels.
The walls are to be built from new load-bearing steel frames and high-strength gypsum（石膏）board. Prof Wilkins said, “If there are any problems, the intelligent sensor network will be able to alert residents immediately so they have time to escape.” If whole groups of houses are so constructed, we could use a larger network of sensors to get even more information. “If the house falls down, we have got hand-held devices that can be used over the rubble to pick out where the embedded（嵌入的）sensors are hidden to get some information about how the villa collapsed.” Also, we can get information about anyone who may be around, so it potentially becomes a tool for rescue.
66. The aim of the passage is to ________.
A. report a piece of interesting news B. promote tremor-resistant homes
C. inform us of the nanotechnology development D. tell us about a tremor-resistant home
67. The villa can resist earthquakes because _______.
A. it will be built on a special place
B. the cracks in its walls can be healed by the polymers
C. the special particles can make its walls stronger
D. the intelligent sensor network can tell people where there is a crack
68. If the tremor-resistant home falls down, _______.
A. rescue work can be done more quickly and accurately
B. the intelligent sensor network will stop working
C. no one can be hurt in the earthquake
D. a warning signal will be given to other residents
69. What Prof Wilkins said suggests that _______.
A. he is doubtful about the project
B. he thinks the tremor-resistant home is perfectly designed
C. he is confident in the tremor-resistant home
D. the tremor-resistant home still needs to be tested in a real situation
70. It can be inferred from the passage that tremor-resistant home _______.
A. is still being tried out B. is already under construction
C. has been in wide use D. will be put into wide use soon
A villa (别墅) designed to resist earthquakes with “self-healing” cracks in its walls, thanks to nanotechnology (纳米技术) applications with self-healing polymers (聚合物), is to be built on a Greek mountainside. The villa’s walls will include special particles that turn into a liquid when squeezed (压榨) under pressure, flow into cracks, and then harden to form a solid material.
The NanoManufacturing Institute (NMI), based in Leeds University, will play a key role in an EU project to construct the home by December 2010. The project, called “Intelligent Safe and Secure Buildings” (ISSB) is funded under the EU’s Sixth Framework program. This potentially life-saving scheme is led by German building manufacturer Knauf. The villa will be built in Amphilochia, in western Greece, where Knauf currently runs a manufacturing plant. If the experiment is successful, more tremor-resistant（防震）homes could be built in earthquake zones across the globe. NMI chief executive Professor Terry Wilkins said, “What we’re trying to achieve here is very exciting. We’re looking to use polymers in much tougher situations than ever before on a larger scale.” Monitors contained in the villa’s walls will be able to collect vast amounts of data about the building over time. Wireless sensors will record any stresses and vibrations, as well as temperature, humidity and gas levels.
The walls are to be built from new load-bearing steel frames and high-strength gypsum（石膏）board. Prof Wilkins said, “If there are any problems, the intelligent sensor network will be able to alert residents immediately so they have time to escape.” If whole groups of houses are so constructed, we could use a larger network of sensors to get even more information. “If the house falls down, we have got hand-held devices that can be used over the rubble to pick out where the embedded（嵌入的）sensors are hidden to get some information about how the villa collapsed.” Also, we can get information about anyone who may be around, so it potentially becomes a tool for rescue.
66. The aim of the passage is to ________.
A. report a piece of interesting news B. promote tremor-resistant homes
C. inform us of the nanotechnology development D. tell us about a tremor-resistant home
67. The villa can resist earthquakes because _______.
A. it will be built on a special place
B. the cracks in its walls can be healed by the polymers
C. the special particles can make its walls stronger
D. the intelligent sensor network can tell people where there is a crack
68. If the tremor-resistant home falls down, _______.
A. rescue work can be done more quickly and accurately
B. the intelligent sensor network will stop working
C. no one can be hurt in the earthquake
D. a warning signal will be given to other residents
69. What Prof Wilkins said suggests that _______.
A. he is doubtful about the project
B. he thinks the tremor-resistant home is perfectly designed
C. he is confident in the tremor-resistant home
D. the tremor-resistant home still needs to be tested in a real situation
70. It can be inferred from the passage that tremor-resistant home _______.
A. is still being tried out B. is already under construction
C. has been in wide use D. will be put into wide use soon
查看习题详情和答案>>C
A villa (别墅) designed to resist earthquakes with “self-healing” cracks in its walls, thanks to nanotechnology (纳米技术) applications with self-healing polymers (聚合物), is to be built on a Greek mountainside. The villa’s walls will include special particles that turn into a liquid when squeezed (压榨) under pressure, flow into cracks, and then harden to form a solid material.
The NanoManufacturing Institute (NMI), based in Leeds University, will play a key role in an EU project to construct the home by December 2010. The project, called “Intelligent Safe and Secure Buildings” (ISSB) is funded under the EU’s Sixth Framework program. This potentially life-saving scheme is led by German building manufacturer Knauf. The villa will be built in Amphilochia, in western Greece, where Knauf currently runs a manufacturing plant. If the experiment is successful, more tremor-resistant（防震）homes could be built in earthquake zones across the globe. NMI chief executive Professor Terry Wilkins said, “What we’re trying to achieve here is very exciting. We’re looking to use polymers in much tougher situations than ever before on a larger scale.” Monitors contained in the villa’s walls will be able to collect vast amounts of data about the building over time. Wireless sensors will record any stresses and vibrations, as well as temperature, humidity and gas levels.
The walls are to be built from new load-bearing steel frames and high-strength gypsum（石膏）board. Prof Wilkins said, “If there are any problems, the intelligent sensor network will be able to alert residents immediately so they have time to escape.” If whole groups of houses are so constructed, we could use a larger network of sensors to get even more information. “If the house falls down, we have got hand-held devices that can be used over the rubble to pick out where the embedded（嵌入的）sensors are hidden to get some information about how the villa collapsed.” Also, we can get information about anyone who may be around, so it potentially becomes a tool for rescue.
66. The aim of the passage is to ________.
A. report a piece of interesting news B. promote tremor-resistant homes
C. inform us of the nanotechnology development D. tell us about a tremor-resistant home
67. The villa can resist earthquakes because _______.
A. it will be built on a special place
B. the cracks in its walls can be healed by the polymers
C. the special particles can make its walls stronger
D. the intelligent sensor network can tell people where there is a crack
68. If the tremor-resistant home falls down, _______.
A. rescue work can be done more quickly and accurately
B. the intelligent sensor network will stop working
C. no one can be hurt in the earthquake
D. a warning signal will be given to other residents
69. What Prof Wilkins said suggests that _______.
A. he is doubtful about the project
B. he thinks the tremor-resistant home is perfectly designed
C. he is confident in the tremor-resistant home
D. the tremor-resistant home still needs to be tested in a real situation
70. It can be inferred from the passage that tremor-resistant home _______.
A. is still being tried out B. is already under construction
C. has been in wide use D. will be put into wide use soon
查看习题详情和答案>>