题目内容

离心泵基本方程是:

A. 表示流量与扬程之间的曲线方程
B. 表示流量与扬程之间的直线方程
C. 表示流速与扬程之间的直线方程
D. 表示流速与扬程之间的曲线方程

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离心泵的理论总压头由:

A. 静压头构成
B. 动压头构成
C. 静压头与动压头之和构成

离心泵基本方程推导的假设条件:

A. 叶轮为具有无限薄、无限多叶片的理想叶轮
B. 泵内所有液体质点的运动都相同
C. 被输送的是理想液体,液体在叶轮内流动不存在流动阻力

离心泵的静压头由()构成:

A. 离心力做功
B. 动压头转换

Using the Right WordFill in the blanks with the words given below, changing the form if necessary. Fill in each blank with one word only.1. She was by his sweet words.2. She was so that she went to the kitchen three times to see whether the fish had been cooked.3. The book was the newspaper. That’s why he couldn’t find it at first.4. The wall of the house was badly damaged by the storm.5. The school that it is doing everything it can to cooperate.6. I’m not at all with the service at the restaurant.7. The results of the research were completely to what we had expected.8. There was a sad on her face when she said she had lost her new cellphone.