听力原文:W: Would you like to order now? M: Yes, please show me the menu. W: Here it is. M: Would you like to recommend something? W: Today's special are steak and cheese cake. Where are the speakers now?
A.
On the farm.
B.
In the restaurant.
C.
At the office.
D.
In the bookshop.
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参考答案:
举一反三
【简答题】一节点连有3条支路,其电流分别为I1、l2和I3,参考方向均离开节点,如果I1=4I3=8A,则I2= A 。