A:Why do you want to see the lions?
B:What do you want to do?
C:When do you want to go?
D:Why do you like the lion?
良好的班风有利于全班学生的健康成长,有利于优秀班集体的形成。营造良好班风的情感基础是( )
某同学对“串联电路电压规律”进行探究.
(1)按图所示电路图连接电路;
(2)闭合开关,用电压表测出L1两端的电压;
(3)在测量L2两端电压时,为了节省时间采用以下办法:电压表所接的B接点不动,只断开A接点,并改接到C接点上;
(4)测出AC间的电压.