看句子，连线。
① Howis your mother? A. Youare welcome.____
②Thank you. B. No, I haven't.____
③Have you got enough food? C.I was in Shanghai.____
④What did you do last Sunday? D. We watched TV at home.____
⑤Where were you two days ago? E. Sheis very well.____
的斜率分别为 
，则 （ ） 
”和“ 
”分别表示两种不同的原子，下列说法正确的是（ ）
