A. 输入数据是否及时 B. 应用系统在管理中发挥的作用及其效益 C. 发现不正确数据的数量及比例 D. 系统是否安全
A. then B. as C. beyond D. than
A. our B. your C. their D. such a
A. but B. nor C. or D. for
A. some B. a lot C. little D. dull