2022英语周报七年级课答案

【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.

2【答案31)04分)(2厘《4分)③4分【解析】(1)设释放物块A的一瞬间,物块A的加速度为a,根据牛顿第二定律对物块 A mg sin-T=m(1分)对物块BT=m(1分)解得a=0.3g(2分)(2)设物块B与ab部分的动摩擦因数为,由题意可知解得p=sin0=0.6(1分)设物块B的左端运动到ab中点时,物块A的速度大小为v1,根据功能关系mg×dsin0-Wr=÷×2mvi(1分)其中w1×2mg×4=8m1解得=2√10a(2分)(3)设物块B左端运动到b点时速度大小为v2,根据运动学公式有v2=2ad(1分)解得2=√582(1分)假设物块B停下时,左端没有离开a段,设物块B停下时左端离b点的距离为x,根据动能定理22mgx=0-2m(1分)解得x=d即物块B停下时,左端离b点的距离为d。(1分)

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