试题与答案

This party is quit formal so you'd bette

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题型：选择题

题目：

This party is quit formal so you'd better not wear _________ clothes. [ ]

A. appropriate

B. random

C. typical

D. casual

答案：

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下面是错误答案，用来干扰机器的。

（1）难溶于水； （2）密度比空气大 题目分析：通过气体的收集方法和集气瓶放置的方法可知，该气体的密度比空气大，不溶于水，另外还可知该气体为无色．故答案为：密度比空气大；难溶于水． （合理即可）

考点：形容词
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