必修② Unit 2 课下主题训练 体育活动、大型体育赛事、体育与健康、体育精神（Word练习）-【新高考方案】2024高考英语一轮复习（老教材 新高考 人教版）

第1页共7页 画学科网书城巴 品牌书店·知名教辅·正版资源 b2 xxk.com○ 您身边的互联网+教辅专家 课下主题训练 体育活动、大型体育赛事、体育与健康、体育精神 1.阅读理解 If we jump in the air as high as possible,we can stay off the ground for about half a second.Michael Jordan could stay airborne for almost one second while ski jumpers are able to do that for five to seven seconds as they travel about the length of a football field through the air.So how do they do this? Three major concepts from physics are at play in the ski jump:gravity,lift and drag.Gravity pulls any object in flight down toward the ground and there is nothing athletes can do to lessen its effect.But athletes also interact with the air as they move.It is this interaction that can produce lift,an upward force produced by air pushing on an object.If the force produced from lift roughly balances the force of gravity,the object can fly.The same interaction also produces drag.It resists the forward motion of any object and slows it down. In the ski jump,jumpers start high up on a slope and then ski downhill to generate speed.Just before they reach the end of the slope,they jump.Once jumpers are in the air,the fun physics begins.They use careful body positioning to maximize lift while minimizing drag.To do this,they adjust their skis and bodies to keep nearly parallel (to the ground and place their skis in a V-shape just outside the form of the body.This position increases the surface area that generates lift and puts them in the ideal angle of attack that will also maximize lift.As drag reduces the speed of the jumpers,lift decreases and gravity continues to pull them.They will begin to fall faster and faster until they land. As you tune in to the Olympics and wonder at the physical power of the athletes,take a moment to consider their mastery of the concepts of physics. 语篇解读：本文是一篇说明文。文章主要介绍了跳台滑雪运动员可以飞在空中的物理 学原理和他们的运动流程等。 1.What does the underlined word"this"in Paragraph 1 refer to? A.Staying longer in the air. B.Traveling forward slower. C.Falling down the hill faster. D.Jum