采煤工作面生产过程中发生透水事故时，透水点往上的人员沿工作面往上经材料道撤离事故点，透水点往下的人员沿工作面往下经运输巷撤离事故点。
参考答案：对
根据句意和提示完成句子。
1. The girl looks very t after she rides on a bus.
2. I don’t know what the book is without a p .
3. In the picture there is a man in a small h .
4. After the boy reached the final(终点),he s raised his arms(手臂).
5. They are having a c with each other.
6. I like the p watch and always wear it.
7. The two girls are getting r to cook.
8. There are d of chains to buy.
方形和矩形断面的渠道断面1及2如图示，若两渠道的过水断面面积相等，底坡i及壁面的粗糙系数n均相同，均匀流的流量关系是（）。
A．Q1=Q2
B．Q1＞Q2
C．Q1＜Q2
D．不定
