问题 单项选择题

离心泵允许吸上高度大小与输送液体介质的温度()

A.无关

B.有关

C.影响不大

D.呈线性关系

答案

参考答案:A

简答题

这是一份小兵同学参加法制宣传日画的手抄报,请你帮他完成。

(1)                                                                                                                                                   

(2)                                                                                                                                                   

(3)                                                                                                                                                   

                                                                                                                                                            

(4)                                                                                                                                                   

单项选择题