精选优质文档-倾情为你奉上上海牛津高一英语专项练习（阅读）Reading Comprehension Passage One Many people hurt their backs when they try to lift heavy things from the floor. It is easy to hurt your back muscles when you pick up a heavy object. However, there is a correct way to lift things from the floor if you pick up or lift heavy objects correctly, you probably will not hurt your back.To lift something from the floor correctly, first bend your knees and squat down. Keep your back straight. Do not bend o
