Particles (minor fragments) of solids or liquids in the air makeup particle pollution are also known as particulate matter (PM). These particles could be dust, dirt, soot, smoke, and liquid drops.
前文提到“The smaller particles are lighter and they stay in the air longer and travel farther”更小的颗粒更轻,它们在空气中停留的时间更长,移动的距离更远。而本段小标题为Particulate Matter and Your Health可知本段谈颗粒对人类健康造成影响,以及空格后“Exposure to particulate matter leads to ...
40.F 【解析】根据 SMALL 中的“The smaller particles are lighter and they stay in the air longer and travel farther. "及本段标题 Particulate Matter and Your Health 可知,PM2,在空中待的时 间更长,飘得更远,危害也更大。 故F项“PM2,can have worse health effects than the bigger PM1o. "...
Particulate matter (PM) is made up of tiny pieces of solid or liquid in the air including dust, dirt, soot and smoke, according to the Centers for Disease Control and Prevention. Inhaled particles are typically categorized into two groups: PM10 and PM2.5 - the number representing the s...
Particulate matter (PM) is made up of tiny pieces of solid or liquid in the air including dust, dirt, soot and smoke, according to the Centers for Disease Control and Prevention. Inhaled particles are typically categorized into two groups: PM10 and PM2.5 - the number representing the...
Fine particulate matter in the air within the limits recommended by WHO alters placental structureObjective To evaluate the effects of PM during the perinatal period on placenta. Methods Female Wistar rats (7-9/group) were exposed to filtrated air (F) or PM2.5 (P) for 15 days. After ...
Particulate matter, or PM, is the term for particles found in the air, including dust, dirt, smoke, and liquid droplets. Particles can stay in the air for long periods of time. Some particles are large or dark enough to be seen as smoke. Others are so small that they can only be ...
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前文提到“The smaller particles are lighter and they stay in the air longer and travel farther”更小的颗粒更轻,它们在空气中停留的时间更长,移动的距离更远。而本段小标题为Particulate Matter and Your Health可知本段谈颗粒对人类健康造成影响,以及空格后“Exposure to particulate matter leads to ...
Particulatematterhasalsobeen a headacheinBeijing,withdensityaveraging141microgrammes. 空气中过多的悬浮微粒同样也是困绕北京市的问题,北京的平均悬浮颗粒密度达到141微克。 dictsearch.appspot.com 10. AIRQUALITY.AMBIENTATMOSPHERE.MEASUREMENTOF THECONCENTRATIONOFPARTICULATEMATTERSUSPENDEDIN THEAMBIENTAIR.GRAVIMETRICMETHOD....