2007年化学试题没有一道偏题、怪题、难题,试题源于教材的内容又高于教材的内容,既注重了基础性,又突出了考试的选拔功能,现简要评析如下。6、下列有关环境问题的说法正确的是A.燃煤时加入适量石灰石,可减少废气中SO_2的量B.臭氧的体积分数超过10~(-4)%的空气有利于人体健康C.pH=5.6～7.0之间的降水通常称为酸雨D.含磷合成洗涤剂易于被细菌分解,故不会导致 2007 chemistry exam questions, strange questions, problems, questions from the content of the textbook is higher than the content of the textbook, not only focus on the foundation, but also highlight the function of the test selection, are briefly as follows. 6, the following statement on the environmental issues is correct A. A suitable amount of coal-fired limestone, can reduce the amount of SO2 in the exhaust B. The volume fraction of ozone over 10 ~ (-4)% of the air is beneficial to human health C.pH = Precipitation between 5.6 and 7.0 is often referred to as acid rain D. Phosphorus-containing synthetic detergents are susceptible to bacterial breakdown and do not result in