齿轮泵端盖开卸荷槽后,泵的流量比不开卸荷槽之前稍有增加。
参考答案:对
— I got an “A” in Chinese again.
— You are ________ again.You can’t get an “A” every time.
A.showing off
B.giving up
C.worrying about
D.coming up with
常用的污泥调理方法有(),(),水力调理。