单选题
By describing a typical situation of a lost driver on the road, the author intends to
A、
make us believe how complex the highway computer network is.
B、
let us know how in-car computers are linked to road signs.
C、
show us how helpful a navigation computer can be.
D、
tell us that NAVSTAR has come into use.
【正确答案】
C
【答案解析】
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