题目

Do you know how discipline can help you achieve your goals? Do you know that discipline is important to __6__？ What is the power of discipline? How to become disciplined? You might think that many people are not self­disciplined, __7__ I'm going to prove to you that people in general are disciplined, but __8__， in non­beneficial ways. There are many people who smoke daily __9__ the fact that it is harmful and __10__ and it could kill them. Such people are disciplined at __11__ cigarettes and smoking. There are people who are disciplined at drinking lots of alcohol daily. Such p 若约束条件所表不的区域为 ，求区域的面积