a pair of cars

[Tofu]

Hello Alan, Mister Micawber, Beeesneees, Mordant, Esl_Expert and other native English speakers,

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http://tinyurl.com/28hug8h
Rescuers dug through debris of the three-story underground garage in Hackensack, N.J., to reach a pair of cars believed to hold people trapped by Friday's collapse.
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Does a pair of cars simply mean "two cars"?

[Beeesneees]

Yes. It's unusual to see it written like that. I would normally expect to see it written as 'to reach two cars', as they aren't a part of a set.
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Cheers m' dears!

[Mordant]

Bev, American journalism seems to like the word "pair" for any two similar things. You may see a "pair of homicides," although they may be totally unrelated.

[Tofu]

Thank you, B and Mordant.

If one of the damaged cars is a RV, is the other a RV too?

[Mordant]

No, Tofu. That may be true, but it doesn't have to be. It's "an RV" because the initialism "RV" begins with a vowel sound.

[Esl_Expert]

[Beeesneees]

Thanks Mordant and Amy.
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Cheers m' dears!