选 D.with
the problem with sth.".的问题" ,这是固定搭配
the main problem with air pollution 空气污染的主要问题
又如:The problem with video game is that they're addictive.
电子游戏机的问题在于它们会使人上瘾.
A serious problem with thermistors is that they tend to drift.
热能电阻的一个严重问题是容易漂移.保证准确率！我们考试时考的！绝对准确! 相信我!
It is reported that PM2.5pollution is the main problem( )air pollution today.A.in B.at C.by D.with
It is reported that PM2.5pollution is the main problem( )air pollution today.A.in B.at C.by D.with
英语人气：205 ℃时间：2019-12-12 04:28:15
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