Without signals from navigation satellites the
问题详情
Without signals from navigation satellites，the in-car computer
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． 请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：B
A和B是正反义项，重点注意。利用“navigationsatellites"作为答案线索，这样在文章中找到答案相关句：Beforestartingoutonatrip，adrivercantypeinthecodefortheregionheorsheplanstodrivethrough．Thecomputerthenshowsamap0fthatregion．Atthesametime，atinyradioreceiverlinkedtothecomputergoestowork．ItpicksupsignalsfromnavigationsatellitessuchastheNAVSTARnetwork．Usingthesesignals,thecomputershowsathecar'spositionatalltimeanddisplaysthispositiononthemap．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。
