After living there for one year, they have ____ there.

A．accustomed to working

B．accustomed to work

C．been accustomed to work

D．been accustomed to working

曝光时间大于0.5s，测量管电流的最佳仪表是（）

A.V表

B.A表

C.kV表

D.mV表

E.mA表