问题
问答题 简答题
虹吸管设计应注意的问题有哪些？
答案
参考答案：
进水自流管或虹吸管的数量及其管径，应根据最低水位，通过水力计算确定。其数量不宜少于两条。当一条管道停止工作时，其余管道通过的流量应满足事故用水要求。
进水自流管和虹吸管的设计流速，不宜小于0.6m/s。必要时，应有清除淤积物的措施。
虹吸管宜采用钢管。
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虹吸管设计应注意的问题有哪些？
参考答案：
进水自流管或虹吸管的数量及其管径，应根据最低水位，通过水力计算确定。其数量不宜少于两条。当一条管道停止工作时，其余管道通过的流量应满足事故用水要求。
进水自流管和虹吸管的设计流速，不宜小于0.6m/s。必要时，应有清除淤积物的措施。
虹吸管宜采用钢管。
| 阅读短文，根据短文内容，用方框中所给的词填空。 | |
once a week. Each time, we choose some books to 3_______ . Then the next time, we tell each other about the books in English. At first, I couldn't express myself very well. One or two weeks later, I 4_______ most people could understand me quite well. They all said I had 5_______ great progress. We watch English films together, too. We watch the same scene several times, and then we act it out. That gives 6_______ good speaking practice and it's great fun. Don't expect to achieve a high level quickly-after all, Rome wasn't built in a day. But 7_______ you keep practicing, your English will get better and better. |