According to ________ announcement by Guangzhou Price Bureau, _________ new measures which have been taken recently are expected to cut the operation costs of each taxi driver by 1280 yuan

A．the; 不填

B．an; the

C．不填 ; the

D．an; 不填

外径千分尺测量精度比游标卡尺高，一般用来测量（）精度的零件。

A.高

B.低

C.较低

D.中等