—He is an old friend of ______.A my B mine C me D myself

—He is an old friend of ______.A my B mine C me D myself

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—He asked the waiter ______ the bill.A on B of C for D after

—He asked the waiter ______ the bill.A on B of C for D after

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用试管法测ABO血型时,红细胞生理盐水悬液浓度规定为()A.1%B.2%C.5%D.10%E.20%

用试管法测ABO血型时,红细胞生理盐水悬液浓度规定为()A.1%B.2%C.5%D.10%E.20%

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I don't know the park,but it's________to be quite beautiful.

I don't know the park,but it's________to be quite beautiful.

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