问题
单项选择题
下列选项中,离心泵轴向力产生的原因是()。
A、入口压力偏大
B、介质粘度大
C、叶轮两侧面的液体压力不对称
D、介质温度大
答案
参考答案:C
下列选项中,离心泵轴向力产生的原因是()。
A、入口压力偏大
B、介质粘度大
C、叶轮两侧面的液体压力不对称
D、介质温度大
参考答案:C
Choose and fill. 请你选择合适的单词填空,将下列句子补充完整。 | |
2. My father walks , but my mother walks slowly. 3. The question is . You can't answer it . 4. Don't speak . The boy is doing his homework. 5. ! You can a lovely cat. 6. Ann, please to the blackboard. |