Unit 4单元话题七选五专项练习(名校最新真题)（2022辽宁高一期末）China is one of the countries with the most serious natural disasters in the world. There are many kinds of disasters, with wide distribution, high frequency and heavy losses. In the background of global climate change, major natural disasters occur from time to time. _1_ It makes China face even much severe and complex situation. In order to rase the awareness of disaster prevention and minimize the losses, warnings and instructions are give to t
