【单选题】有一个量程为300V(即测量范围是0~30伏)的电压表,它的内阻是40kΩ,用它测量电压时,允许渡过的最大电流是()。
【单选题】在外界条件不变的情况下,用同一仪表对被测量在仪表全部测量范围内进行正反行程(即被测参数逐渐由小到大和逐渐由大到小)测量时,被测量值正行程和反行程所得到的两条特性曲线之间的差值,称为
【简答题】有一只量程为 500V (即电压测量范围为 0-500V )的电压表,它的内阻为 40K Ω。用它测量电压时通过电压表的最大电流是多少?(提示:把电压表看成一个阻值较大的导体)
【单选题】Peter had to wait two hours at the doctor’s ________.
【单选题】Peter had to wait two hour at the doctor's _____.
【单选题】有一个量程为300伏,(即测量范围是0~300伏)的电压表,它的内阻是40千欧,用它测量电压时,允许流过的最大电流是()。
【单选题】保证测量仪器规定的准确度、满足误差在规定极限之内的量值范围,即为_________。
【单选题】We missed our train, and ________ the next train was delayed, ________ we had to wait for another two hours.
C.
what was worse; therefore