唯物史观认为,杰出人物的出现是()
A.历史命运的安排
B.纯粹的历史必然
C.时代发展的需要
D.纯粹的历史偶然
参考答案:C
"_____ the bell. Class is over," said the teacher. [ ]
A. Went there
B. There goes
C. There is going
D. Has there gone
初步功率分布是指下述哪种功率分布( )
A.不计阻抗上的功率换耗时
B.计及阻抗上的功率损耗时
C.计及阻抗上的电压损耗时
D.计及阻抗上的电流损耗时