——Why didn't you go to Tom's birthday party?
——Sorry, _________.
A:I wasn't invited
B:I didn't invited
C:I can't invite
D:I aren't invited
如图,小佳通过实验测得L1、L2两只小灯泡电压的大小以及电源电压的大小,请你帮助小佳得出实验结论:并联电路中各支路两端电压 ____,并且 ____电源电压.
下图是英国部分年代棉纺织品出口价值变化示意图,导致这种变化的主要因素是()