从方框中选择适当的句子补全对话，有两项多余。
A: Good morning.
B: ____
A: Do you have a friend here?
B: Yes, I do.
A: ____
B: Oh. She is my friend, Amy.
A: ____
B: She comes from the USA.
A: She looks like Judy.
B: ____
A: Are they in the same grade?
B: Yes. ____
A: Is Judy your friend, too?
B: No, she isn't.
A. But they're in different classes. B. Where is she? C. They are sisters. D. Good morning. E. Thank you. F. Where does she come from? G. Who is that girl? |
（2）闭合开关，用电压表测出L1两端的电压，并将数据记录表（3）仿照（2）分别测出BC和AC两端的电压，并将数据记录表
