科目:初中英语 来源: 题型:填空题
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Country | City | PM2.5concentration (浓度) | Family (million) | Cars (million) | Ways to control PM 2.5 |
China | Beijing | 1.121 | 6.9 | 5.2 | In January 2012,PM2.5was first tested(检测) by China.Beijing,Shanghai,Tianjin,Shandong and Wuhan have taken action to test PM 2.5step by step. |
Japan | Tokyo | 0.023 | 4.3 | 8 | Japanese experts all agree PM2.5comes from the tail gas of the car.They use the white towel to test tail gas. |
America | New York | 0.021 | 6 | 8 | In 1997,America first set up a level to test PM2.5.They use colors to show the air quality.Green means"good".Orange means"dangerous".Red means"unhealthy". |
England | London | 0.029 | 2.7 | 4 | We can test air quality (质量)by phone and show it to the public. |
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科目:初中英语 来源: 题型:选择题
A. | on; in | B. | in; under | C. | on; under | D. | in; in |
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