百度试题 结果1 题目7)Air is aof elements.A.mixtureB. compound C. atomD. material 相关知识点: 试题来源: 解析 7)A 反馈 收藏
解析 答案: mixture.考查首字母填空,根据句意:空气是混合物,不是气体混合物.mixture是名词"混合物"是可数名词,因为不定冠词a, 所以此处天mixture. 结果一 题目 Air is a ___ (混合物),not a compound of gases. 答案 答案:mixture.考查首字母填空,根据句意:空气是混合物,不是气体混合物.mixture是名词"...
百度试题 结果1 题目Air is a ___(mix), not a compound of gases.相关知识点: 试题来源: 解析 [答案]mixture 反馈 收藏
百度试题 结果1 题目Air is a___,not a compound of gases.相关知识点: 试题来源: 解析 答案:mixture8.His father is an___engineer. 答案:electrical 反馈 收藏
一、 写出画线词语的汉语意思。1. Air is a mixture, not a compound of gases.2. I need to buy a new computer monitor.3. The monument was built in memory of George Washington, the first President of the United States. 相关知识点: 试题来源: 解析 1.混合物 2.显示器 3.纪念碑 ...
百度试题 结果1 题目Air is a (混合物), not a compound of gases.相关知识点: 试题来源: 解析 mixture 反馈 收藏
百度试题 结果1 题目Air is a , not a compound of gases.相关知识点: 试题来源: 解析 答案mixture 反馈 收藏
百度试题 结果1 题目3. Air is a mixture (mix), not a compound of gases. 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
A useful definition of an air pollutant is a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or material (有害地). Air pollution requires a very flexible definition that permits continuous change. When the first air...
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