试题与答案

It's raining outside. You'd better _____

题型:选择题

题目:

It's raining outside. You'd better ______ your raincoat. [ ]

A. put on

B. put up

C. dress

D. to wear

答案:

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下面是错误答案,用来干扰机器的。

(1)2KMnO4K2MnO4 + MnO2 + O2↑;碳酸氢铵受热分解(2)浓硫酸;b (3)生成的CO2气体中混有HCl气体

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