直流双臂电桥可以较好地消除接线电阻和接触电阻对测量结果的影响，是因为双臂电桥的工作电流较大的缘故。
参考答案：错
光滑铜管内径d=10mm，平均流速1m/s，流体的运动黏性系数为1×10-6m2/s，则其沿程损失系数是( )。
A．0.032
B．0.042
C．0.022
D．0.01
The young man was glad that his experience as a cook in the army finally ____.[ ]
A. paid off
B. paid for
C. paid up
D. paid back
