A:两个电压表的读数相等
B:两个电压表的指针偏转角度相等
C:两个电压表的读数之比等于两电压表的内阻之比
D:两个电压表指针偏转角度之比等于两电压表内阻之比
关于电阻的计算式R= UI 和决定式R=ρ LS ,下面说法正确的是( )
(1) She bought a ____ (bath) suit last Sunday.(2)I like doing some ____ (shop) at weekends.(3)She hasn't ____ (feed) the cat yet.(4)There are about ten ____ (well) in that village.(5)Has the camera been____ (pack) yet?