题目

如图所示是四位同学在学完电路连接相关知识后所画的电路图。你应该能判断出：在开关S闭合时，两只小灯泡能同时发光的正确电路是A. B. C. D. 答案：【答案】B【解析】A. 在开关S闭合时，右端的灯被短路，只有左端的灯亮。B. 在开关S闭合时，两个电灯都亮。C. 电路中没有电源，电灯不会亮。D. 开关不闭合，右端的灯就亮了，即开关没有控制右端的灯。故选B.8．从对话后的方框中选择适当的选项补全对话．A：（61）AB：I'm not feeling well．A：You've been like this since you got here，haven't you？B：（62）CA：Do you know why？B：（63）DIt's awful．One day it's hot，but the next day it's rainy．No matter what I wear，I'm never dressed properly．A：You haven't learned to predict the weather here．I've been here for eight years，and I never get sick．B：（64）BA：Well，there's a weather hotline．Every morning you can call it to find out what the weather will be like during the day．B：I know that hotline，but I've never called it．I've heard it's expensive． A．What's the matter？B：What should I do then？C：Yes，for about four weeks．D：The weather in this city changes so often．