首页/ 题库 / [单选题]学习时长:00:02记笔记 提高功率的答案

学习时长:00:02记笔记 提高功率因数的意义在于

单选题
2021-09-08 14:12
A、防止设备损坏
B、提高输电效率和供电设备利用率
C、提高电源电压
D、提高电源容量
查看答案

正确答案
B

试题解析

相关题目
boost的意思是:help or encourage to increase or improve
eloquent的意思是:fluent or persuasive in speaking or writing

A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.

学习时长:00:01记笔记中国哲学有一个大别于西方哲学的地方,在于有关气的学说不止是一种理论概念,而且有——。
学习时长:00:02记笔记 空心线圈的自感系数与( )有关
学习时长:00:02记笔记 提高功率因数的意义在于
学习时长:00:01记笔记 区域0 < Imz <1是( )
学习时长:00:01记笔记 函数w=(az+b)/(cz+d) (其中ad-bc<0) 把z平面的上半平面保角映射成w平面的( )
学习时长:00:01记笔记OCL功放电路中,输出端(即中点)的静态电位为( )
什么是功率因数?提高功率因数的意义是什么?答:有功功率与视在功率的比值叫做功率因数,用cosφ表示,即cosφ=P/S。提高功率因数的意义在于:(1)提高供电设备的利用率;(2)减少输电线路上的损耗,提高输电效率。因此,提高功率因数对节约电能有重大意义。
一项关于吸烟与肺癌关系的病例对照研究,研究结果表明OR为4.0,其意义是()
在应用ORS液的过程中,错误的是()
Mainly east 3 or 4 partly cloudy to overcast occasional rain()slowly south moderate or good.
()any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local quarantine officer must be notified immediately.
Should any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local Quarantine Officer must be()immediately.
Masters are()solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.
系统中雷达状态包括Unknown、Operational(or ON)、Failed(or OFF)、Detached。
The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire,()the claimant proves that the fire arose from fault or neglect on the part of the carrier,his servants or agents.
Shutdown price(or point,or rule) 停业价格(或停业点、停业原则)
翻译:With Average or With Particular Average(WA or WPA)()
广告位招租WX:84302438

免费的网站请分享给朋友吧