¾ Are you waiting for a bus from Medical University?

¾ Yes. I arrived here at the bus stop ten minutes ago, but the bus _______.

A．hadn’t come

B．won’t come

C．didn’t come

D．hasn’t come

以下哪项不属于网络经济时代新的基础设施（）。

A.物流

B.云计算平台

C.宽带网络

D.智能终端