(1)已知x m =3,x n =5,求x m+n 。 (2)已知x m =3,x n =5,求x 2m+n ; (3)已知x m =3,x n =15,求x n 。
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【单选题】—It's such a perfect day. Say, why don't we pack a picnic lunch and go to the park? We can invite some other people to come to-Nancy, Rob, charlotte, Ben, their kids… —________. —Anything but pizza.
A.
That's one of the best ideas I've heard in weeks. What should we take on the picnic?
B.
I'd like to very much, but I have to prepare for my examination.
C.
That's great! Shall we go to the seaside for a walk?