【判断题】功率因数角φ有正负之分,以说明线路是感性还是容性,φ>0°时,为容性,功率因数超前;φ<0°为感性,功率因数滞后。< /div>
【单选题】What is the largest public library in the United States?
A.
The library of Harvard College.
B.
The Library of Congress.
C.
The library in Philadelphia.
D.
The library in New Englan
【单选题】2014 年 9 月 9 日上午 , 习近平在会见 “ 庆祝第三十个教师节暨全国教育系统先进集体和先进个人表彰大会 ” 受表彰代表后来到北师大 , 看望教师学生。习近平在考察中强调 , 百年大计 , 教育为本 , 教育大计 , 教师为本。国家之所以高度重视教育 , 主要是因为 ( ) 1 教育决定着文化的发展方向和社会制度的变化 2 教育具有选择、传递、创造文化的特定功能 3 教育是发展科技和培养...
【单选题】What is the largest benefit the Net has brought to the management of companies?
A.
It has brought the largest profits to them.
B.
It has greatly improved their management.
C.
It has helped cut short their human resources.
D.
It has significantly changed their image.
【单选题】习近平总书记强调,百年大计,( )为本。( )是人类传承文明和知识、培养年轻一代、创造美好生活的根本途径。 (《习近平谈治国理政》,《让十三亿人民享有更好更公平的教育》第191页)