（）是气压制动跑偏的原因。
A、制动总泵.制动踏板行程调整不当
B、空气压缩机传动带打滑
C、制动阀调整不当
D、两前轮轮胎气压不一致
参考答案：D
符号(A/P，i，n)是用以表示( )。
A．偿债基金系数
B．资本回收系数
C．普通年金终值系数
D．普通年金现值系数
As the busiest woman in Norton, she made her duty to look after all the other people's affairs in that town. [ ]
A. this
B. that
C. one
D. it
