The air quality in the city, ______ is shown in the report, has improved over the past two months.A. that B. it C. as D. what四个选项如何区分

英语翻译Although the Jordanian air quality standards limit particulatematter in the air space,there is no current limitation on con-centration or mass loading of heavy metals due to particulateemissions.The purpose of this study was to quantify t 单项选择__ 74 cities in China adopted the new strict air quality standards in 2013,only three out of 74 cities's air quality is up to standard.A.Since B.Although in the open air stick in the air in the air是什么意思 in the air on the air WORLD AIR QUALITY怎么样 air jet quality 如上 Lots of people in urban areas are now concerned about the quality of the air they________(breath).breath为什么不是：breathing? 辨析 in the air,on the air,in air,on air in the open air造句 catch bubbles in the air In the Air意思是? castles in the air是什么意思 In The Air Tonight 歌词 love isdefintely in the air. Love's In The Air Breathe (In The Air) 歌词