—The cake smells ___________ bad.
—It goes ___________ easily if you don't keep it in the fridge.
A:terrible; bad
B:terrible; badly
C:terribly; bad
D:terribly; badly
——It's a __________day today. Let's go _________.
——Great. Let's go.
已知点P(﹣1,2),点P关于x轴的对称点为P1,关于直线y=﹣1的对称点为P2,关于直线y=3的对称点为P3,关于直线y=a的对称点为P4,分别写出P1,P2,P3,P4的坐标,从中你发现了什么规律呢?