复算法
参考答案：
是指审计人员对被审计单位的书面资料的有关数据进行重新计算，用来验算原计算结果是否正确的一种方法。
There is ______ kind of people who don’t like anything that others like.
A．a certain
B．certain
C．certain a
D．sure
E-mail is very popular today. People hardly post letters, ________? [ ]
A. did they
B. do they
C. didn't they
D. don't they
