在流速相等的条件下，Dg200管子的流量是Dg100管子流量的（）倍。
A、1
B、2
C、4
D、8
参考答案：C
根据句意和首字母完成句子。
1. Let's go up the m______, I want to get the top first.
2. They can run very f______.
3. These animals are our f______.
4. We shouldn't w______ too much water.
5. Please turn off the light w______ leave the room.
解释岸桥参数外伸距的含义？
