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  3. Dogs are known for a strong sense of smell. Their noses can be trained to id

Dogs are known for a strong sense of smell. Their noses can be trained to id

游客2024-04-16  27
问题     Dogs are known for a strong sense of smell. Their noses can be trained to identify different【B1】______. Dogs are often used in search and rescue operations and to sniff for things like drugs and explosives.
    Researchers have been trying to reproduce the extraordinary sense of smell that real dogs【B2】_____. Now, officials at the Glasgow airport in Scotland are testing a new security device called an "electronic sniffer dog." The electronic sniffer dog【B3】_____ one of the latest developments in the area of smell technology. A Scottish company, Cascade Technologies,【B4】_____ with the French security company Morpho to develop it. The device uses lasers to identify explosive material in gases in the air. The purpose is to identify explosives that may be【B5】______on a person’s body.
    The machine looks similar to the metal detectors now used at airports. Passengers【B6】_____ the machine as the lasers test the surrounding air. People are not required to take off their coats, belts or shoes as part of the security process. And, unlike full-body scanners, the new device does not show【B7】_____of the passenger.
    Officials at Cascade Technologies say the machine can process one person per second and produce almost 【B8】_____results. They say future developments could cut security processing times at airports by screening all passengers at walking speed.
    Unlike real dogs, electronic devices do not【B9】_____or need to be walked or require food and water. Real sniffer dogs need very extensive training that could be expensive. And when they work they have to have a very【B10】_____handler around them. [br] 【B8】
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答案 immediate
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