At present,_____ number of students are near-sighted and, what’s worse, _____number of them is increasing.

A．a; the

B．a; a

C．the; the

D．the; a

TB/T2301.3－92《铁路车号员技术作业标准直通列车技术作业》出发列车车号员技术作业中“程序一：检查现车”对车号员有何技术要求？