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ImmigVisa & LandingPaper got in person from Canadian Consulate Buffalo
No you can not without a TRV, you need to have a valid TRV and study permit to go to USA and come back.
Your question relates to a TRV with single entry, this can allow you to travel to USA as many times as possible even though its not a multiple visa but to most countries you need multiple to go in and out of canada.
So get your TRV before you head for your interview in Buffalo. Except you are an indigene of a country who dont need temp resident to enter canada which you have not disclose in your post.
I wish you all the best man! lol
Take a look at the mail below:

A single entry visa allows you to enter Canada only once. This visa may also be used for repeated entries into Canada from the USA or St. Pierre and Miquelon provided you do not enter another country. Such entries must occur within the time validated for your stay in Canada.(e.g. You may be given six months from the date you enter Canada at the Port of Entry)

A multiple entry visa allows you to enter Canada from any country multiple times during the validity of the visa
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