2013
高考英语二轮复习讲义（阅读理解）及训练17：（答案） 小试牛刀--------阅读理解 air quality in shanghai worsened last week compared with the previous 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)
