Ⅰ．体验H₂O₂分解的实验意义

A: Hello,Lily. ____?

B: I' m going to have a party for my 14th birthday this weekend.

A: Oh, that's wonderful! ____?

B: I will have it at home. ____? I'll be happy if you can come.

A: Sure, I'd love to. And I'll bring some cakes made by my mom. She's good at baking (烘焙), you know.

B: Thanks.

A: ____ ?

B: It will start at 10 o'clock on Saturday morning. After that, how about going to the park?

A: ____! We can fly a kite there.

B: OK. See you then.

设$a=3^{0.5},b={\log }_{3}2,c=\cos 2$，则（    ）