正确答案:

题目：最简单的有机物

解析：H

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举一反三的答案和解析：

[单选题]下列实例中，材料的选用与描述的物理属性不相符的是（）

热水壶的手柄用胶木制成，是因为胶木的导热性好

[单选题]20．

interesting

解析：20.C【解析】如果你得到足够的睡眠、食物、休息和锻炼，学英语会效率很高，并且非常有趣，

[单选题]下列说法不正确的是（ ）

面粉，蔗糖灼烧后都变成炭黑，说明它们是相同的物质

[单选题]AIf you go to a fast food restaurant．you will probably see a lot of teenagers． Today，many teenagers are overweight，and some of．this is because of their bad eating habits．， Most teenagers love food with a lot of fat，oil，salt，and sugar． People often call this kind of food "junk food"．

fat，oil，salt and sugar

解析：．21．D【解析】由第一段最后两句Most teenagers love food with a.lot of fat，oil，salt，and sugar. People of- ten call this kind of food“junk food".可知。

[单选题]What is a shortcoming of Armstrong’s work according to the author?

It lacks new information.

[单选题]13．

What's

解析：13．C【解析】对电话号码提问应该用What's …？。