—How many computers are there in the room?

—__________. Some workers moved them to another place just now.

A．None

B．Both

C．Nobody

D．Neither

大宗笨重货物远距离运输时，应尽可能地利用（　　）

A．水运或铁路运输

B．公路或铁路运输

C．航空或水路运输

D．水路或公路运输