离心泵流量调节方法?
参考答案:
①改变泵出口管路阀门开度。
②改变泵的转速。
Mr. Lambers refuses to pay income taxes because his conscience will not allow him to support a government that spends billions of dollars on military weapons. Mr. Lambers’s reasoning best illustrates Kohlberg’s () stage.
A.Egocentric
B.Preconventional
C.Postconventional
D.Conventional
体育学术论文撰写可分为:();();总体构思,拟定提纲;写作初稿;修改誊写等几步。