题型:排序题 给下面的句子排序。( ) Can you help him find it? ( ) He is dirty. ( ) Li Ming needs the sink. ( ) Here is the sink. ( ) He needs to wash his hands and face! 查看答案
题型:选择题 如图所示,R1=20ΩR2=10ΩR3=5ΩR4=10Ω电源电动势为36V,内阻为2Ω则关于AB两点间电势的高低正确的是( )A.A比B 高10VB.A比B低10VC.A比B 高5VD.A比B 低5V 查看答案