高中英语人教版（2019）必修 第二册 Unit 4 History and traditions 根据汉语意思填空 强基固本专项练习50题 （ 含答案）考试试卷正在持续更新，目前趣对答案为大家整理了相关试题及答案，供大家查缺补漏，高效提升成绩。

Craig Fugate,former administrator of the Federal Emergen- cy Management Agency (FEMA),says it's clear that natural disasters are happening more often."I've been doing this for over 30 years.I can remember when FEMA had really big disasters maybe every four or five years.Not every year.Certainly not multiple disasters in one year,"he says. Government statistics show that in the 1980s,there were fe- wer than four-billion-dollar disasters driven by extreme weather annually,on average.The past five years have seen more than 12 such disasters each year.The damage totals are adjusted for in- flation.That has happened as the planet has warmed by almost 2 degrees Fahrenheit compared with the late 1800s.Average tem- peratures could rise another 2 degrees by 2100,and even more if countries fail to cut their greenhouse gas emissions.