During the past week, Beijing has been covered with thick smog that is forecast to stay until this weekend at least.
The smog, covering 1.43 million square kilometers mainly in northern China, made the Beijing government give an orange alert - the second-highest warning - and ordered people not to leave their homes.
A study in 2013 by researchers at Tsinghua University said that there were more than 1,300 microbes(可吸入颗粒) in the atmosphere over Beijing. Although most of them may do no harm to human health, the number still makes people worried.
Zhuang Guoshun, director of the Center for Atmospheric Chemistry Study at Fudan University, said Beijing is covered by smog for an average of 60 percent of the year, while the number for Shanghai is 30 to 50 percent.
However, research studies have found that higher air pollution levels do not exactly mean higher risks of early death or other health illnesses.
One of the scientists' main attentions is the level of PM2.5 - floating matter of 2.5 microns (微米)or smaller, which can go deep into the lungs(肺) and even enter the blood.
Guangzhou and Shanghai in the south of China have slightly higher relative risks to early death from the effects of PM2.5 than Xi'an and Beijing in the north, even though the levels of PM2.5 in the northern cities were nearly twice those in the south, according to a study published in September 2013, led by Pan Xiaochuan, a professor at Peking University's School of Public Health.
1.What colour warning is the second-highest one?
A. Blue. B. Orange. C. Red. D. Black.
2.The third paragraph mainly tells us that __________．
A. the number of microbes worries people B. smog does no harm to our health
C. the professor is from Fudan University D. Beijing must pay attention to the pollution now
3.According to the fourth paragraph, we can see that in a year Shanghai is covered with smog at least __________ days.
A. 73 B. 110 C. 146 D. 183
4.Which city has a little higher relative risk to early death from PM 2.5?
A. Xi’an B. Beijing C. Nanjing D. Guangzhou
九年级英语阅读单选困难题
During the past week, Beijing has been covered with thick smog that is forecast to stay until this weekend at least.
The smog, covering 1.43 million square kilometers mainly in northern China, made the Beijing government give an orange alert - the second-highest warning - and ordered people not to leave their homes.
A study in 2013 by researchers at Tsinghua University said that there were more than 1,300 microbes(可吸入颗粒) in the atmosphere over Beijing. Although most of them may do no harm to human health, the number still makes people worried.
Zhuang Guoshun, director of the Center for Atmospheric Chemistry Study at Fudan University, said Beijing is covered by smog for an average of 60 percent of the year, while the number for Shanghai is 30 to 50 percent.
However, research studies have found that higher air pollution levels do not exactly mean higher risks of early death or other health illnesses.
One of the scientists' main attentions is the level of PM2.5 - floating matter of 2.5 microns (微米)or smaller, which can go deep into the lungs(肺) and even enter the blood.
Guangzhou and Shanghai in the south of China have slightly higher relative risks to early death from the effects of PM2.5 than Xi'an and Beijing in the north, even though the levels of PM2.5 in the northern cities were nearly twice those in the south, according to a study published in September 2013, led by Pan Xiaochuan, a professor at Peking University's School of Public Health.
1.What colour warning is the second-highest one?
A. Blue. B. Orange. C. Red. D. Black.
2.The third paragraph mainly tells us that __________．
A. the number of microbes worries people B. smog does no harm to our health
C. the professor is from Fudan University D. Beijing must pay attention to the pollution now
3.According to the fourth paragraph, we can see that in a year Shanghai is covered with smog at least __________ days.
A. 73 B. 110 C. 146 D. 183
4.Which city has a little higher relative risk to early death from PM 2.5?
A. Xi’an B. Beijing C. Nanjing D. Guangzhou
九年级英语阅读单选困难题查看答案及解析
About ________ of the earth is covered with water, but more and more water has been polluted.
A.three-forth B.three-forths C.three-fourth D.three-fourths
九年级英语单选题简单题查看答案及解析
_______the past two months he has been busy with his school work.
| A．For | B．On | C．Since | D．At |
九年级英语单项填空简单题查看答案及解析
_____ , he has been to Beijing because he knows so much about the city.
A. At last B. However C. Without doubt D. Once in a while
九年级英语单选题中等难度题查看答案及解析
It is said that _______ of confirmed cases(确诊病例) in Beijing _______over 300 during the past days.
A.the number; has reached B.a number; has reached
C.the number; have reached D.a number; have reached
九年级英语单选题中等难度题查看答案及解析
Mr. Green _______ to Beijing two weeks ago. He ______ there many times.
| A．has gone; has been | B．went; has been | C．has gone; went | D．went; went |
九年级英语单项填空困难题查看答案及解析
My father _________ Beijing many times. He _________ there again last week.
A．has been to; has gone B．has gone to; went
C．has been in; has gone D．has been to; went
九年级英语单项填空简单题查看答案及解析
In some cities, something _______ to stop the sale of live poultry（活禽）during the past weeks.
A．will do B．have done C．has been done D．will be done
九年级英语单项填空中等难度题查看答案及解析
During the ______ holiday, they visited a lot of places of interest in Beijing.
A. two weeks B. two-week \
C. two week’s \ D. Two-weeks
九年级英语单项填空简单题查看答案及解析
—_____ heavy the rainstorm is!
—Yes, the town has experienced the most serious flood during the past ten years.
A.How B.What C.How a D.What a
九年级英语单选题中等难度题查看答案及解析