Being asked if he could come to the party that night,                .

A．nobody said anything

B．they didn’t get an answer from him

C．nothing was said by him

D．John nodded his head and left the room

反映世界新技术革命成果，带动整个产业结构向高度化演进的产业是（）

A．主导产业 

B．战略产业 

C．基础产业 

D．高新技术产业