Peter: Hi, Sally. Come and have a look at my photos.
Sally: Are these the photos you took in Africa, Peter?
Peter: 【小题1】 Look, this is a wildebeest. It’s an animal in Africa.
Sally: 【小题2】
Peter: No, it doesn’t. It only eats grass.
Sally: Are there a lot of animals in Africa?
Peter: 【小题3】
Sally: Oh, this photo looks interesting. What are you doing there?
Peter: 【小题4】
Sally: Did you have a good time there?
Peter: Of course. 【小题5】
2x+t |
x2+1 |
x1α+x2β |
x1+x2 |
x1β+x2β |
x1+x2 |
v(m/s) | 0 | 1.00 | 1.41 | 1.73 | 2.00 | 2.45 | 3.00 | 3.16 |
h(m) | 0 | 0.05 | 0.10 | 0.15 | 0.20 | 0.30 | 0.45 | 0.50 |
测试点距岸距离 x/m | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
管内外高度差 h/cm | 0 | 0.8 | 3.2 | 7.2 | 12.8 | 20.0 | 28.8 |
相应的水流速度 v/ms-1 |