用于加盖在个人存单的印章是（）。
A.业务专用章
B.假币章
C.业务办讫章
D.假币鉴定专用章
参考答案：A
A．U=vBl，流过固定电阻R的感应电流由b到d
B．U=vBl，流过固定电阻R的感应电流由d到b
C．U=vBl，流过固定电阻R的感应电流由b到d
D．U=vBl，流过固定电阻R的感应电流由d到b
—We don't know _____________.
—It is said that he was born in Sweden. [ ]
A. what he is
B. if he lives here
C. where he comes from
D. which country is he from
vBl
vBl