//Python学习// 第4周 简单分支、多分支、异常处理、循环结构
1.PM2.5:if，ifdef main(): PM=eval(input("What is today's PM2.5?")) if PM>75: print("UNhealth") if PM<35: print("Good")main()2.二次方程求解:if elseimport mathdef main(): print("This...
