2021-2022 英语周报 高三 新目标 23答案

第二节书面表达Dear peter'm writing to invite you to attend a lecture about exercise and health inour schooAs you know there are many students who are overweight or short-sightedin our school. They devote all their energy to studying and ignore exercised healthy as they should be. Besidgirls choose to keepby controlling their diet. which also affecthealth. So we hoThe lecture, which is to be held next Friday afternoon inhool hall. willlast from 3: 00 p. m. to 5: 00 p. m. I hope you can attend and share somethingwith usLooking forward to yourYours sincerelLi hua

答案(1)144(2分)(2)1.00(2分)0.10(2分)申題摺导明确实验原理是解题关键,本题根据图像结合牛頓第二定律写出a与F的函数关系表达式,确定m和{解题思路(1)由逐差法得加速度(789+932)-(500+64410-m/s2=1.44m/s(2)根据牛顿第二定律有2F-ume=ma,得a=-g,由图丙可知,2=2k83,g=1m,解得m=10kg=0.10

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