【简答题】Buddy Clawson adjusted the stage props as he listened to the audience settle into their seats. He peeked through the crack in the curtains. New York gentlemen and ladies in their finest attire murmure...
【单选题】The total berth time for a vessel can be reduced through a reduction().
C.
in productivity of the working shifts
D.
of working hours each working day
【判断题】TT系统中,当电气设备的金属外壳带电时,由于有接地保护,故没有触电的危险性。()
【单选题】在Flash中,并不是所有的视频都能导入到库中,如果视频不是.FLV 或.F4V 格式,则可以使用( )以适当的格式对视频进行编码。
【简答题】A Change of Fortune Buddy Clawson adjusted the stage props as he listened to the audience settle into their seats. He peeked through the crack in the curtains. New York gentlemen and ladies in their f...
【单选题】测量制动盘厚度和端面跳动量时,测量工具需要距离制动盘边缘( )毫米。
【判断题】36V及以上和由于绝缘损坏可能带有危险电压的电气设备的金属外壳等必须有保护接地。
【单选题】因漏电保护需要,将电气设备正常运行情况下不带电的金属外壳和机械设备的金属构架接地称为保护接地。阻值应不大于()Ω。
【单选题】建设工程项目设计概算是确定和控制建设工程项目全部投资的文件,其作用不包括
C.
作为考核设计方案的经济合理性和控制施工图预算和施工图设计的依据
D.
作为考核和评价建设工程项目成本和投资效果的依据
【单选题】In sleeping rooms on board, _______should be installed at the head of each berth.
A.
an electric reading lamp