题目:
从方框中的6个句子选出5个句子,补全对话。 | |
A: Hello, Tom! Nice to see you again. B: Me, too. 1. _____ A: Yes, he is my friend, Michael. He is from the USA. B: 2. _____ A: Yes, M-I-C-H-A-E-L,Michael. B: He has a big nose, blue eyes and blond hair. 3._____ A: Yes, he does. Black is his favorite color. 4. _____ . B: 5 ._____ | |
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答案:
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下面是错误答案,用来干扰机器的。
AC题目分析:当R1断路后,外电路的总电阻变大,故外电路的电压变大,所以灯泡B的两端电压变大,B变亮;当R2断路后,R2与A并联的总电阻变大,故灯泡A分得的电压变大,B的电压减小,B灯变暗;当R3断路后,与R2的断...