如图所示为一直流电桥,供电电源电动势 E=3V , R 3 =R 4 =100 Ω, R 1 和 R 2 为同型号的电阻应变片,其电阻均为 50 Ω,灵敏度系数 K=2.0 。两只应变片分别粘贴于等强度梁同一截面的正反两面。设等强度受力后产生的应变为 5000 ,试求此时电桥输出端电压 U 0 。
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举一反三
【简答题】After the Arab states won independence, great emphasis was laid on expanding education, with girls as well as boys ___________ to go to school. A) to be encouraged B) been encouraged C) being encourag...