高考阅读理解之主旨大意题1
来源：高中英语教学交流
发布时间：2010-05-04 21:11:00
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内容提要：一篇文章一般表达一个中心或主题。这个中心或主题通常用一个句子来概括，此句叫主题句，这类题主要考查读者把握全文内容或理解中心思想的能力，也包括分析归纳文章段落大意、重要情节、人物特征、写作特点的能力。
三、考题探究
PITTSBURGH – For most people, snakes seem unpleasant or even threatening. But Howie Choset sees in their delicate movements a way to save lives.
The 37-year-old Carnegie Mellon University professor has spent years developing snake-like robots ，he hopes will eventually slide through fallen buildings in search of victims trapped after natural disasters or other emergencies.
Dan Kara is president of Robotics Trends, a Northboro, Mass.-based company that publishes an online industry magazine and runs robotics trade shows. He said there are other snake-like robots being developed, mainly at universities, but didn’t know of one that could climb pipes.
The Carnegie Mellon machines are designed to carry cameras and electronic sensors and can be controlled with a joystick（操纵杆）。 They move smoothly with the help of small electric motors, or servos, commonly used by hobbyists in model airplanes.
Built from lightweight materials, the robots are about the size of a human arm or smaller. They can sense which way is up, but are only as good as their human operators, Choset added.
Sam Stover, a search term manager with the Federal Emergency Management Agency based in Indiana, said snake-type robots would offer greater mobility than equipment currently available, such as cameras attached to extendable roles.
“It just allows us to do something we’ve not been able to do before,” Stover said, “We needed them yesterday.”
He said sniffer dogs are still the best search tool for rescue workers, but that they can only be used effectively when workers have access to damaged building.
Stover, among the rescue workers who handled the aftermath （后果） of Hurricane Katrina, said snake robots would have helped rescuers search flooded houses in that disaster.
Choset said the robots may not be ready for use for another five to ten years, depending on funding.
What is the text mainly about?
A. Snake-like robots used in industries.
B. Snake-like robots made to aid in rescues.
C. The development of snake-like robots.
D. The working principles of snake-like robots.
学海导航：B 该题是考查文章的主旨大意。文章的第一段只是引出这一话题，第二段才是本文的主题，第二段中提到Choest讲究snake－like robots是因为he hopes will eventually slide through fallen buildings in search of victims trapped after natural disasters or other emergencies，由此可知，Choset 研究蛇形机器人的目的是为了在自然灾害或其他的紧急事故中起作用。