离心式压缩机试车时,启动主油泵,()调至规定值时,应仔细检查油系统是否泄漏。
A.油温
B.油液位
C.油压
D.油量
参考答案:C
We must ________ to all kinds of lies. Let's calm down and settle the problem.
A. come to an end
B. keep one's end up
C. put an end
D. bring it to an end
常量滴定管、半微量滴定管和微量滴定管的最小分度值各是多少?