20228年纪级英语周报答案

13.D【解析】4~10年时λ<1,种群数量减少,年龄组成均为衰退型,A项错误;20~24年种群增长率最大,使种群数量维持在该水平可获得最大经济价值,B项错误;第20年时心>1,且维持稳定,种群数量呈“J”型增长,没有K值,C项错误;第20~24年种群数量持续增长,种群年龄组成为增长型,D项正确,

第三节One possible versionParagraph 1Then one day when we got to the school with his usualbig smile, he started to lean towards me. But I put my handup and said, No, Dad. It was the first time I had evertalked to him that way and he had this surprised look onhis face. I said, 'Dad, I am too old for a goodbye kiss. Iam too old for any kind of kiss, My dad looked at me forthe longest time, and his eyes started to lear. I had neverseen him cry. He turned. ' You are right, ' he said."Youare a big boy .. a man. I will not kiss you anymoreParagraph 2Tears began to well up in franks eyes, as he spokeIt wasnt long after that when my dad went to sea andnever came back. I looked at Frank and saw that tearswere running down his cheeks. Frank spoke again."Guysyou dont know what I would give to have my dad give mejust one more kiss on the cheek

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