题目

从下面的方框中选择适当的选项补全对话。（有两项是多余的） W: Hello, Tom. Are you free tomorrow? A. She’s got long dark hair and she wears glasses. B. Does she carry anything easy to recognize? C. Can you help me to meet her at the airport? D. What’s the flight number? E. How does Kate think of China? F. At half past three tomorrow afternoon. G. Why does your sister come to China?  M: Yes. Why? W: My sister will come from England tomorrow, but I’m busy with my school work. ________66________ M: Sure. What’s her name? W: Kate. M: Oh, wait a moment. I’ll 14．如图所示电路，电源电压保持不变，R1=10Ω．闭合S、S1，电流表的示数为0.3A，再断开开关S1，电流表的示数变化了0.2A．则闭合S、S1后，R1与R2的电功率之比是3：2，电阻R2工作2分钟产生的热量是72J．