题型:填空题 浩浩在学习了滑动变阻器的原理后,用铅笔芯代替电阻线制作了一盏实验台灯。如图所示是台灯的原理图,AB表示铅笔芯,P是滑片,浩浩选择的小灯泡L上标有“6V 3W”的字样。闭合开关S后,把滑片P移到A端时,小灯泡正常发光;把滑片P移到B端时,电流表的示数为0.2 A.(小灯泡的阻值不随温度变化)求:(1)小灯泡的电阻;(2)铅笔芯的最大阻值;(3)当滑片P滑到B端时,小灯泡的实际功率。 查看答案
题型:填空题 -What an amazing story! It’s the most impressive story I’ve ever read.-But I’m sure it won’t interest ____.A.somebodyB.everybodyC.nobodyD.anybody 查看答案
题型:填空题 When I passed the entrance examination, my family_____ me ______ my success.A.celebrated; onB.congratulated; onC.celebrated; toD.congratulated; to 查看答案