---I hear Huang Gang made an English speech at his graduation ceremony yesterday.

--- ________, and ________.

A．So he did, so did I

B．So did he, so I did

C．So he was, so was I

D．So was he, so I was

在TD-LTE采用双路分布系统设计方案时，组成MIMO天线阵的两个单极化天线尽量采用（）以上间距，如实际安装空间受限双天线间距不应低于（）。

A、15λ，4λ

B、10λ，2λ

C、10λ，4λ

D、10λ，1λ