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Are these correct in American English?

1)these sentences mean the same,don't they? "It is a wolf's baby." and "It is a wolf baby." Which one is more preferable?

2)When someone turns a hearter on,is this quesion correct:Is that a heating or an air conditioning? do we need the "a" befor heating and the "an"before air? How do we ask it in other ways?

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bassa1)these sentences mean the same,don't they? "It is a wolf's baby." and "It is a wolf baby." Which one is more preferable?
The meaning is the same. We call a young wolf a cub, so we would say, "It's a wolf cub". (not wolf's)
bassa2)When someone turns a hearter on,is this quesion correct:Is that a heating or an air conditioning? do we need the "a" befor heating and the "an"before air? How do we ask it in other ways?
If you don't know what it is -- a heater or an air conditioner -- you ask with "a". In this case "a" means "an example of a" or "an instance of a":

Is that a heater or an air conditioner?

If you use the -ing endings you're making a slightly different form. Then you need:

Is that a heating unit or an air conditioning unit?

CJ
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I don't get why we don't say "wolf's cub"?
bassaThanks Emotion: smile

I don't get why we don't say "wolf's cub"?

You can. That's another way to say it, but in that situation we usually just say "wolf cub". There are many cases like it. "a bear cub", "a goose egg", "a chicken leg", "a car radio". They are called compound nouns.

CJ

Edit: I may be mistaken about "cub". I think "pup" is used: "wolf pup". I can never remember which animals have cubs and which ones have pups! Emotion: smile
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You are right it is called "cub". We studied that today Emotion: smile
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