Compared with the previous week, air quality in Shanghai became worse last week , accordin

Compared with the previous week, air quality in Shanghai became worse last week , according to the latest report from the Shanghai Environment Monitoring Centre．
The average air pollution index （API） for sulphur dioxide （SO2） remain almost unchanged from the previous week, but the APIs for nitrogen oxide （NOx） and total suspended （悬浮） particles （TSP） rose by 35 and 27 percent．
The overall quality still belonged to class 2 category．Nitrogen oxide, caused mainly by vehicle exhaust and burning of cooking gas, was still the major pollutant of the week．
The Shanghai Environmental Monitoring Centre operates six automatic air monitors in the city’s Putuo, Yangpu, Luwan, Hongkou, Jing’an and Xuhui districts．

【小题1】Judging from the chart, on which day was the air quality the worst?A．October 13．B．October 14．C．October 17．D．October 18．【小题2】Which of the following can be used to describe the air quality of the week?A．Good．B．Seriously polluted．C．Excellent．D．Slightly polluted．【小题3】Six automatic air monitors are operated in the city except     ．A．Putuo DistrictB．Xuhui DistrictC．Chang’an DistrictD．Hongkou District【小题4】In shanghai, nitrogen oxide mainly es from     ．A．the burning natural gasB．the burning cooking gasC．the burning coalD．dust raised by vehicles【小题5】This passage is obviously taken from     ．A．a magazine about air pollutionB．a scientific report from TVC．the weather column in a newspaperD．the traveling guide to ShanghaiB【小题1】A【小题1】C【小题1】B【小题1】C