防爆电气设备的标志包含型式、等级、类别和组别 , 应设置再设备外部主体部分的明显地方，且应在设备安装后能 清楚看到。标志“ Er d ⅢB T3 Gb的正确含义是( ) 。
C
暂无解析
客运索道是指利用动力驱动、柔性绳索牵引箱体等运载工具运送人员的机电设备，包括客运架空索道、客运缆车、客运拖牵索道等。客运索道的运行管理和日常检查、f修是其安全运行的重要保障。下列客运索道安全运行的要求中，正确的是（）。
安全检查表是发现潜在危险，检查某一生产系统或设备的安全状况、预测和预防事故的生要手段，按其用途有（）。
叉车是一种对成件托盘货物进行装卸、堆垛和短距离搬运的轮式车辆。关于叉车安全使用要求的说法，正确的是（）。
根据人与机器个方面特性的差别，可以有效地进行人机功能的分配，进而高效地实现系统效能。关于依据人机特点进行功能分配的说法，正确的是（）。
The syntactic rules of any language are ______ in number.
_______ for the free ticket, I would not have gone to see film so often.
They ________ extensive and possibly dangerous actual flight training.
________ he has many friends, he is often feeling lonely.
I hope that it is possible to achieve this objective by calling on the smokers ________ good judgment and show concern for others rather than by regulation.
Since the premium varies with the scope of ____ extra premium is for buyer ' s account, should additional siske covered?( )
William Faulkner set most of his works in the American( ),with his emphasis on the( )subjects and consciousness.
________ you had been here, we wouldn ’ t have had so much trouble then.
They wrote a letter of thanks to ________ had helped them.
The reply, when it finally came, was ________ the negative.