参考答案：错

解析：[听力原文]The acids in acid rain are corrosive chemicals that leach nutrients from the soils, slow the growth of trees, poison lakes and combine with other chemicals to form urban smog. The simplest way to curtail acid rain is to use less energy from fossil fuels.[难点] “combine with other chemicals to form urban smog”含动词不定式，结构较复杂，对理解构成一定难度。