题目内容

____是一种以叔碳酸乙烯酯为主要原料的水性涂料。

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____的分散介质为空气,是目前比较环保的涂料。

___________ a few spelling mistakes, it is on thewhole a good composition.

We would have arrived two hours ago_____________ the traffic jam.

____________ money, they’re quite rich.

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