A.政府部门 B.行业协会 C.设备供应商
A.应变能力 B.服务意识 C.心理素质 D.礼貌礼节
A.修理完成 B.抢修处理 C.测试合格
A.电话订房 B.电传订房 C.传真订房 D.订房管理
A.Their variable costs are much more than fixed costs. B.Their demand can be segmented into classes. C.There can be substantial fluctuations in the demand. D.They have a relatively fixed total capacity.