英语周报八年级新目标第27期2021-2022答案

34【答案】(1)ABE(5分)(2)①3(6分)②2/3L(4分)【解析】(1)t=0时质点A速度沿y轴正方向,可知该波沿x轴负方向传播,A项正确;t=0.1s时,质点A第二次到达正向最大位移处,可知1-+T,解得周期T=0n6ms,B项正确;波传播过程中,质点08s,波长A=3.2m,则该波的传播速度为v=只能在平衡位置附近振动,而不随波迁移,C项错误;t=0时,B质点正在平衡位置向下振动,第一次到达正的最大位移处需t=4T=0.068,D项错误,E项正确(2)①完整的光路如下图所示由几何关系,由∠ADE=∠DAE=C可得∠AED=-2C,由B+x-2C=5可得P=2C-3(2分)由折率的定一”一金合一分整理可得33sin(2C-万)8nC·解得C=3,由可得2分)②由n=5,可得光在介质中的速度v=(1分)由几何关系,光在介质中运动的路程为FD+DE=L(1分)结合4=2,:=201(2分

【语篇类型】记叙文【主题语境】人与自我—一团队合作【文章大意】小男孩Jos一家靠捕鱼为生。因为喜欢足球,小男孩无心帮助捎鱼,爷爷的一番话让他明白一家人捕鱼和足球运动样,只有团结合作才能成功。【写作指导] anagraph1的段首句是"当Jos进来时,爷爷拾头看着他,然后示意他过来",再结合续写笫二段的段首句可知,续写第投主要围绕爷爷把№s叫过去后和他谶话的内容以及Js对这些活的反应为主裉 Paragraph2的段首句中的" a family is like soccer"以及"worktogether"可知,Jos意识到无论是踢足球还是一个家庭都霄要团结协作的精神,故本段应围绕他思想和行动的转变展开。One possible versionParagraphGrandpa looked up at Jose when he entered, and then signalled to hito come over. As Jose approached him, Grandpa smiled, and then hisfingers went back to work. "In some ways, Jose, a family is like a fishingnet,Grandpa said as he wove strings of rope together to repair the brokelinks. "The strength of the whole depends on the strength of each linkJose knew he had let them down when he had run off after the net broketoday. It reminded Jose of what the coach had been saying aboutParagraph 2Grandpa, I guess a family is like soccer, too. Eneryone needs to worktogether to succeed, "Jase said. "I'm sorry about today. " Grandpa pattehim on the hack affectionately. then Jose ran to help grandpa fold thefishing net. The next day, Jose got up earlier than usual and fed Felix andPedro. On the beach, Jose grabbed the net and look his step steadily,moving al the pace of others. "How is your soccer practice going? " hissister came, asking. "So-so. But I would behave better today, "Josereplied, with a knowing smile. He was sure of it.

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