【简答题】汽车尾气 ( 含有烃类、 CO 、 SO 2 与 NO 等物质 ) 是城市空气的污染源。治理的方法之一是在汽车的排气管上装一个“催化转换器” ( 用铂、钯合金作催化剂 ) ,它的特点是使 CO 与 NO 反应,生成可参与大气生态环境循环的无毒气体,并促使烃类充分燃烧及 SO 2 的转化。 (1) 写出 CO 与 NO 反应的化学方程式: _____________________________ ...
【简答题】Passage 4 Climate change is not just a change in the (1) ____________ temperature; it is also a change in the weather. Scientists say we can expect more extreme weather s along with some areas s...
【简答题】任选两个任务编写对话 Task 1 : Ask for Mark’s comments on the weather. Task 2 : Ask about and describe the weather at this time of year. Task 3 : Ask Mr. Green about the weather condition tomorrow and plan an ac...
【简答题】Read the following paragraph and identify its main idea by filling in the blank. 1 Creatures that are very sensitive to the changes in the air before a storm can “predict” a change in the weather. 2 B...