用户申请办理17kW的三相电,应配备电能表的电流参数为()。
A.3*1.5(6)A.
B.3*5(20)A.
C.3*10(40)A.
D.3*20(80)A
参考答案:C
The Zhang family are looking forward to owning a house. Last week they went to see several houses, but of them was suitable.
A. either B. neither C. none
在填料吸收塔中用清水吸收氨一空气混合物中的氨。混合气的进塔组成为0.025,出塔组成为0.001(均为摩尔比),操作条件下的气液平衡关系为Y=0.88x。若吸收剂的用量为最小用量的1.65倍,则实际操作的液气比为()。
A、1.584
B、1.394
C、0.845
D、1.80