硬脂酸镁作为润滑剂,可选用的最佳用量为()
A.1%
B.3%
C.2%
D.7%
E.10%
参考答案:A
解析:硬脂酸镁作为润滑剂,用量一般为干颗粒的0.3%~1%。选A
Selected financial information gathered from Alpha Company and Omega Corporation follows:
Which of the following statements is most accurate()
A. Alpha is more operationally efficient than Omega
B. Omega uses its fixed assets more efficiently than Alpha.
C. Omega has less tolerance for leverage than Alpha.
直流电机试验中,升压发电机在反馈试验线路中所起的作用是:()。
A.提供回路总铜耗
B.提供铁损耗
C.提供空载损耗
D.提供全部试验损耗