如何暂停一个打印队列?() ["lpr","lpq","lpc","lpd"]
下列哪个不是超硬材料的结构特点?() ["强金属键","强共价键","强离子键","强氢键"]
交易所对金锭入库称差规定范围()克(含)内。 ["±0.05","±0.1","±0.2","±1"]
运行中如发现同一车轮有()条或以上螺栓被拉断,应按规程应及时更换。 ["A、2条","B、3条","C、4条"]
客户在9:00做了一笔报价,该报价的有效期为()。 ["9:00-11:30","9:00-15:30","9:00-21:00","9:00-2:30"]
我国隋代的河北()是世界上现存最早的敞肩式石拱桥。