与 “ It was in 1879 that Thomas Edison invented the light bulb. ”中的it is...that功能不同的是:
A.
It is at our mother's knee that we acquire our noblest and truest and highest ideals, but there is seldom any money in them.
B.
It is a truth universally acknowledged that a single man in possession of a good fortune must be in want of a wife.
C.
It is this approach towards impartiality that constitutes growth in wisdom.
D.
In Nanjing, capital of East China’s Jiangsu province, it is the People’s Liberation Army that helped to clear the streets of snow.