不平衡电流测量试验用的设备通常有（）级电流表、0.2级电压表及调压设备。
A.0.1
B.0.2
C.0.5
D.1.0
参考答案：B
To be honest, a lot of people attach great importance to ______rich and famous.
A．become
B．have become
C．having become
D．becoming
由于摩擦力的存在，总是伴随着热的产生，摩擦具有（）性。
