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By describing a typical situation of a lost driver on the road, the author intend to ______. Without signals from navigation sa
By describing a typical situation of a lost driver on the road, the author intend to ______. Without signals from navigation sa
admin
2009-06-15
91
问题
By describing a typical situation of a lost driver on the road, the author intend to ______.
Without signals from navigation satellites, the in-car computer ______.
选项
A、would still be able to locate the car’s position at all times
B、would fail to locate the car’s position
C、would still work out the best route to follow
D、would seek help from the radio receiver linked to it
答案
B
解析
A和B是正反义项,重点注意。利用“navigation satellites”作为答案线索,这样在文章中找到答案相关句:Before starting out on a trip,a driver Can type in the code for the region he or she plans to drive through.The computer then shows a map of that region.At the same time,a tiny radio receiver linked to the computer goes to work.It picks up signals from navigation satellites such as the NAVSTAR network.Using these signals,the computer shows a thecar’s position at all times and displays this position on the map.划线句说“使用这些(来自导航卫星)的信号,计算机能一直在地图上显示出汽车的位置”,显然如果没有导航卫星的信号,计算机就无法确认汽车的位置,所以B是答案。
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