This pair of shoes ________ mine. Those shoes __________ John’s.

A．is; is

B．are; are

C．is; are

D．are; is

车厂微机联锁故障瘫痪，导致单元控制台或数字化显示器不能确认进路状态时，信号值班员必须严格执行无联锁接发车的规定，采用（）法组织列车出入厂。