淘宝对违背承诺投诉的处理原则是什么？

A. select job from emp;
B. select job,count(*) from emp;
C. select distinct job,count(*) from emp;
D. select job,count(*) from emp group by job;
E. select job,sum(empno) from emp group by jo

A. 正确
B. 错误

A. 软弱层
B. 下卧层
C. 老土层
D. 基础