2022七年级下册英语周报新目标JME答案

6.【答案】A【解析】捕食的结果可能导致被捕食种群数量下降,被捕食者种群数量下降后,捕食者种群由于缺少食物,其种群数量也降低,之后会使被捕食种群数量增加,二者通过相互调节,各自维持其数量相对稳定,A项错误;捕食者一般捕食的是种群中的老弱病残个体,客观上对被捕食种群的发展起到促进作用,B项正确;捕食者一般捕食数量较多的种群,为其他生物的发展腾出空间,故捕食关系的存在有利于生物多样性的形成,C项正确;捕食关系利于增加生物多样性,从而实现维持生态系统的稳定性,D项正确。

应用文写作( One possible versionDear FrankWe plan to participate in the weeklong labor practice in the school field base scheduled from August Ito 8. Im writing to invite you to Join usThe base offers free accommodations and various activities. Participants can learn to do outdoor worklike farming or gardening. The art of making tea, which interests you very much, is also taught. Whatattracts me most is that we'll learn to raise animals such as goats or rabbitsIn the practice, we can experience the value of labor and expose ourselves to a wide range of practicalskills, which will surely benefit usLooking forward to your replyYoursLiH

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