Man: How well are you prepared for your presentation Your turn comes next Wednesday.Woman: I spent a whole week searching on the net, but came up with nothing valuable.Question: What did the woman say about her presentation

A．It has nothing to do with the Internet.

B．She needs another week to get it ready.

C．It contains some valuable ideas.

D．It's far from being ready yet.

下列哪些影响，属于输变电工程的环境影响有（）。

A.生态环境影响

B.水土流失的影响

C.雾霾的影响

D.电磁环境的影响