2022英语周报zjz第答案

37.(10分,除标注外,每空1分)(1)Sbc少d(2)出生率、死亡率(3)增长型资源和空间有限(或“天敌增多”,2分)(4)A(5)幼年【解析】(1)由图形可知,种群数量不是一直呈一定倍数增加,故应呈“S”型增长;种群增长速率在b段最大;e点时种群数量应比d点时少,因为在此区间种群数量是减少的(2)湖泊中鯽鱼种群数量的决定因素只能是出生率和死亡率。3)据图2分析AB段出生率远远高于死亡率,所以推断该种群的年龄组成是增长型的;C点后,该种群死亡率明显增加可能的原因是外界环境的恶化,如资派和空间有限(或天敌增多等)(4)在渔业生产中,捕捞后应使鱼种群的年龄组成为增长型。(5)关于某濒危野生动物资源,应注意保护幼年个体,以维持其增长潜能

第二节Dear WangmingHow are you recently? I am sorry that I haven't written to you so long, ow my familycoronavirus hasntare very up. You must knowthe novbeen controlled effectivelysince it broke out in the US and so many people are being infected every day. So we dare notgo out because ofYou are lucky. When the novel coronavirus broke out in China, thegovernment took strong and effective measures and controlled its spread. There have been nolocal cases of infected people since September. China is great! Chinese people are lucky! Ireally regret coming here sometimes. I hope that I can return to our motherland as soon aspossibleFinally may you make great progress!LiHua.

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