【单选题】一只额定值为220v/60w的灯泡接在电压 V的电源上工作,消耗的功率()
【简答题】Expenses that are incurred during anaccounting period but that, prior to end-of-period adjustments, remainunrecorded because payment is not due are ( )A. Prepaid expenses. B. Unearned expenses....
【判断题】When we use the FIFO method we make no distinction between work done in the prior period and work done in the current period
【单选题】某试制的注射剂(输液)使用后造成溶血,应如何改进
【判断题】边界摩擦发生在界面的润滑油膜内,摩擦阻力最小,磨损最小。
【多选题】关于自动开关门装置叙述正确的是?
A.
电梯门锁钩扣入时,电气联锁应可靠接通,锁钩与钩头完全勾住,并使电气触头与锁钩任然有2-3mm的弹性间歇。
C.
电梯的开关门驱动电机有交流电机、直流电机及伺服电机多种。
D.
门系统自动开关门过程电梯应在平层位置,停车状态。
【判断题】减小飞机摩擦阻力最好的办法是调整分离点。()
【多选题】不单独核算废品损失的企业相应的费用体现在()科目中。