变压器带负荷运行在铜耗和铁耗相等时,效率最高,称为经济运行。()
参考答案:对
整个车间的设备安装后的负荷试运转费属于( )。
A.联合试运转费
B.设备购置费
C.设备安装费
D.生产准备费
—This digital camera is really cheap!
—The()the better. I' m short of money, you see.
A. cheap
B. cheaper
C. expensive
D. more expensive