— Would you mind not littering in the classroom?  

— ________. I'll pick up the waste paper. [ ]

A. With pleasure    

B. Thanks    

C. No, not at all      

D. Yes, that's it.

“弹性原理”中“留有余地”的方法主要是指（）

A、保存从宽，销毁从严

B、复本从宽，孤本从严

C、销毁从宽，保存从严

D、孤本从宽，复本从严