问题
选择题
如图所示的电路中,电源电压恒定,闭合开关S,调节滑动变阻器的滑片使小灯泡L正常发光;若再断开开关S,要使小灯泡L仍正常发光,应将滑动变阻器的滑片( ) A.保持不动 B.向a端移动 C.向b端移动 D.无法判断 |
答案
答案:C
如图所示的电路中,电源电压恒定,闭合开关S,调节滑动变阻器的滑片使小灯泡L正常发光;若再断开开关S,要使小灯泡L仍正常发光,应将滑动变阻器的滑片( ) A.保持不动 B.向a端移动 C.向b端移动 D.无法判断 |
答案:C
小题1:Lucy lost her . A、book B、ruler C、dictionary 小题2:Lucy’s phone number is . A、four eight two seven three six nine B、four eight seven two three seven nine C、four eight two three seven six nine 小题3: found a set of keys. A、Lucy B、Tony C、Nick 小题4:Lucy is . A、twelve B、eleven C、nine 小题5:Tony’s telephone number is . A、687-5143 B、768-1543 C、867-5143 |