题目

世界上最大的内海是加勒比海，我国的内海有（ ） A．黄海和渤海     B．渤海和琼州海峡 C．东海和琼州海峡     D．渤海和东海 答案：B．PM2.5——Killer in China 10:00 a.m. April 1st,2014AQIPM2.5细颗粒物。PM10可吸入颗粒。AQI空气质量指数。PM2.5（单位：μg/m3）表示每立方米空气中可入肺颗粒物的含量。根据表格所提供的信息选择最佳答案。1.The AQI in Beijing is much __________ than that in Sanya.A．betterB．worseC．bad2.The air in ___________ is both heavy pollution.A．Shanghai and BeijingB．Beijing and TangshanC．Tangshan and Harbin3.If you are in Tangshan, you had better _________.A．have outdoor activitiesB．breathe fresh airC．stay at home4.The amount of _______in the air in Sanya is the same as that in Harbin.A．SO2B．O3C．CO5.Which of the following is not TRUE according to the information above?A．The air in Harbin is middle pollution, we’d better not go out to work.B．We can know the AQI of April 1st from the table.C．O3 in Shanghai is the most of all the cities.