Recently, employees at the Shanghai Metro’s Railway Station Stop have been busy learning dialects from other parts of the country, ___________ aims to provide better service to travelers from outside the city.

A．where

B．that

C．which

D．it

实施暂予扣留、封存时应当向文件、资料、财务账目等材料的持有人出具（）。

A.监察建议书

B.监察通知书

C.介绍信