纵向定位轴线编号应用（），从下至上顺序编写。
A.大写英文字母
B.小写英文字母
C.阿拉伯数字
D.任意符号
参考答案：A
Affected by the financial crisis, Jack's business is not as good as before, so he has to ________ the expenses of his company.
A．cut off
B．cut away
C．cut up
D．cut down
为什么要进行数据处理？
