— What can I do for you?
— ________.
A:Yes, you can
B:No, you can't
C:I'd like a shirt
D:I think so
如图所示电路,电源两端电压保持不变。闭合开关S,当滑动变阻器的滑片P向右滑动时,下列判断正确的是()
“龙生龙,凤生凤,老鼠的儿子会打洞”这句谚语揭示的生物现象是( )
30是____个十,3个十乘4得____个十,就是____。