By describing a typical situation of a lost driver on the road, the author intends to The navigation computers have one thing i

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问题 By describing a typical situation of a lost driver on the road, the author intends to
The navigation computers have one thing in common: they all

选项 A、contain series of maps on videodiscs or videotapes.
B、contain 13,300 maps covering the continental US.
C、can be obtained free of charge.
D、cost a lot of money.

答案A

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