【简答题】课后题3.7 图 为一直流电桥,负载电阻 R L 趋于无穷。图中 E= 4 V , R 1 =R 2 =R 3 =R 4 = 120Ω ,试求: 1 R 1 为金属应变片,其余为外接电阻,当 R 1 的增量为 Δ R 1 = 1.2Ω 时,电桥输出电压 U 0 = ? 2 R 1 、 R 2 为金属应变片,感应应变大相同,其余为外接电阻,电桥输出电压 U 0 = ? 3 R 1 、 R 2 ...
【简答题】2 Complete the words in the text. My
brother has very little ► success in exams. He gets very nervous and generally
has a negative (1) a____ to them. He’s so nervous that he can’t follow the (2)
i...