问题
应用设计题
如图所示，在圆圈内分别填入正确的电表符号，使开关闭合后两灯都能发光。
答案
答案如下图
题目分析：电流表由于电阻很小，在电路中相当于导线；电压表电阻很大，在电路中相当于断路。电流表在电路中与用电器串联，电压表和被测电路并联，此图中灯L2与下面的电表串联，所以下面的电表为电流表。上面的电表与灯L2是并联的，所以上表为电压表。
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如图所示，在圆圈内分别填入正确的电表符号，使开关闭合后两灯都能发光。
答案如下图
题目分析：电流表由于电阻很小，在电路中相当于导线；电压表电阻很大，在电路中相当于断路。电流表在电路中与用电器串联，电压表和被测电路并联，此图中灯L2与下面的电表串联，所以下面的电表为电流表。上面的电表与灯L2是并联的，所以上表为电压表。
When Bill and Kate married(结婚), neither of them had much money, so they were not able to __44__ a house. Two years later, Bill’s father died (去世了) and ____45____ him some money, so they bought a house..When they moved into ___46___ for the first time, one of Bill’s friends sent him a bottle of wine _____47____ a present. The bottle was in a paper box. At that time, Bill and Kate had a lot of ____48___to do. They had to clean the house and decided where to put their TV sets, beds, cupboards, desks and tables. They were so busy that they forgot about the bottle of wine. They put it in a cupboard and didn’t ____49___open the paper box. A few months later, when they had a baby, Bill __50___ some friends to his house. He thought of the wine and found it out from the cupboard. It was so sweet. Bill had never thought that would be the best present for the wonderful party for his wife and his baby.
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