-- Can a camel swim?
--
A:No, fish swim.
B:Yes, it can.
C:No, a tiger has stripes.
D:No, the lion big.
地球“雨极”乞拉朋齐位于( )
在图所示的电路中,电源电压不变,闭合电键S,当滑动变阻器的滑片P向左移动时( )