—Would you like to come to dinner this Sunday, Xiao Ming?

—________. [ ]

A. I'd love to, but I have lots of things to do.

B. Oh, no. That'll be too tired.

C. I'll stay at home.

D. Yes, please.

某城市属于老工业区，为了更好地监测其空气质量，调查污染源时应

A．四周布点

B．捕捉烟波布点

C．扇形布点

D．按城市功能分区布点

E．沿交通路线布点