问题描述:
Air pollution comes from dust from construction sites.就画线部分提问(dust from construction sites)
还有:That aeroplane flew 26956589 kilometres.就画线部分提问(26956589 kilometres)
还有:That aeroplane flew 26956589 kilometres.就画线部分提问(26956589 kilometres)
问题解答:
我来补答展开全文阅读