第二次工业革命中,有“航空飞行器的先驱”之称的人是( )
A:卡尔·本茨
B:爱迪生
C:史蒂芬孙
D:莱特兄弟
The students asked Mr. Wang ______ them some advice on reading.
— is it from Suqian to Jiuzhai Valley?
—About l,900 kilometers away. But I'm not sure.