水电站实际发电量与来水理论发电量的比值指的是（）。A.水能利用率 B.水能利用提高率 发布时间：2019-09-26 01:16 │ 来源：www.tikuol.com 题型：单项选择题 问题： 水电站实际发电量与来水理论发电量的比值指的是（）。A.水能利用率B.水能利用提高率C.水量利用率D.水能开发率
题型：单项选择题 某国产骄车每行驶100km消耗10L汽油，汽油的密度为0.72×103 kg/m3，则汽车行驶50km消耗的汽油的质量为 kg．当该汽车以50kW的功率，在平直公路上以72km/h的速度匀速行驶时，它所受到的阻力 N． 查看答案
题型：单项选择题 从方框中选择最佳选项完成对话，有两项多余。A. That's good idea. B. I'm calling to thank you for your present. C. Yes, very much.D. Well, I saw many old things on show. E. I called you yesterday, but you were not in. F. How was your trip?G. When did you go there?A: Hello, Jim. This is Ann speaking.B: Hi, Ann.A: 1____B: Do you like it?A: 2____ It's a beautiful sweater. I really like the color.B: I think the blue is just the right color for you. By the way, you looked wonderful at the party.A: Thank you. I really enjoyed it. 3____ B: Oh, I'm sorry. I went to the Science Museum.A: What did you see?B: 4____ A: Wow! Are there any new things?B: Yes, many more! Why not go there and have a look?A: But I don't know the way to the museum.B: Don't worry. I'll go with you.A: Great! Thanks. 查看答案