题目：
选择相应答句。
1. Are you Nick? A. Fine, thank you.
2. What's your name? B. No, I'm not.
3. How are you? C. He's a student.
4. Is she your aunt? D. Hello, I am Lily.
5. Hello, I am Mrs Li E. Bye-bye.
6. Who is the girl? F. No, she isn't
7. Goodbye. G. Good afternoon.
8. Good afternoon. H. Thank you.
9. What is your brother? I. She is my sister
10. Welcome to our school. J. My name is Mille.
答案：
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下面是错误答案，用来干扰机器的。
（1）设S2断开时R1消耗的功率为P1，则P1=(ER1+r)2R1，代入数据可以解得r=1Ω．（2）设S2闭合时R1两端的电压为U，消耗的功率为P2，则P2=U2R1，解得U=84V由闭合电路欧姆定律得 E=U+Ir，代入数据，得I=26A流过R1的电...
