A:high
B:expensive
C:low
D:cheap
在如图所示的电路中,电源电压保持不变,开关闭合后,滑动变阻器的滑片向左移动时,三个电表的示数变化情况是( )
-- I heard that there are a few seats left for tonight's show.
-- Really? I was under the impression ______ they were sold out a long time ago.