根据对话内容，从方框内选择恰当的句子将对话补充完整。（选项中有两项是多余的）

A: Hi, Jason. Would you like to come over to my home this weekend?

B: ____What are we going to do together?

A: We're going to play chess on Saturday morning and I am going to cook noodles for you.

B: Are you joking?____

A: Of course I can. I've learned cooking on TV.

B: ____

A: For two days. My parents have been away on business so I cook by myself.

B: When will they come back?

A:____ During these days, I have to do a lot of things alone.

B: I'm sure you will have a special experience.

A: Yes. ____I like trying new things.

B: You bet! See you then.

A: See you.

2010年我国的第六次人口普查，主要采用了下列哪一种科学探究的常用方法？（　　）

（2015•莱芜）下列运算正确的是（　　）