对万用表欧姆档调修应从R×1开始逐档到最大量程，且对影响电流、电压的有关电阻不允许再调。
参考答案：对
—I did not know you were good friends.
—You__________. I have known her since she moved here. You were abroad then.
A．may have
B．needn’t have
C．couldn’t have
D．must have
核级机械部件与设备的抗震鉴定设备抗震鉴定和动力学鉴定所采用的方法？
