题目

补全对话: 从方框中选出恰当的句子完成对话。A: Is there a bank around here?B: Hi, excuse me.C: Oh, that’s great!D: where’s Bridge Street?E: No problem.Tony: 【1】.Linda: Yes. How can I help you?Tony: Well, I’m new in town. 【2】?Linda: Yes, there is. It’s on Bridge Street. It’s across from the supermarket.Tony: Oh,...【3】?Linda: It’s not too far from here. I can walk with you.Tony: 【4】! Thanks so much.Linda: 【5】.如图所示，拉力F=125N，在10s内将重G=300N的物体匀速提升2m，试求：（1）有用功；（2）滑轮组的机械效率；（3）此过程拉力F的功率．