2022届高三英语培优外刊阅读学案：濒危动物话题.docx

高三英语培优外刊阅读 班级：____________学号：____________姓名：____________ 外刊精选｜ 科学家克隆濒危动物，让33年前的雪貂重生 去年12月，一只克隆雪貂在 美 国出生，它克隆的是一只已经去世32年，一直被冷冻保存的雪貂。作为第一个被克隆的北 美 本土濒危物种，这一消息在 美 国引起不少关注。人类几十年来一直在克隆技术领域不断探索，这只克隆雪貂的出生让人们看到了挽救濒危物种的新希望。有很多物种都处于濒危状态，科学家们这次为什么会选择雪貂呢？ Meet Elizabeth Ann, the First Cloned Black-Footed Ferret By Sabrina Imbler Last year, Ben Novak drove across the country to spend New Year's Eve with a black-footed ferret. Elizabeth Ann had just turned 21 days old — surely a milestone for any ferret but a particularly meaningful one for Elizabeth Ann, the first of any native, endangered animal species in North America to be cloned. Mr. Novak, the lead scientist of the biotechnology nonprofit Revive & Restore, spent less than 15 minutes with Elizabeth Ann, whose black mask, feet and tail were just beginning to show through her downy white fur. "It felt like time stopped," Mr. Novak said. Thankfully, time has not stopped for Elizabeth Ann, who now looks bigger, browner and considerably more like a ferret. Cloned siblings are on the way, and potential (cloned) mates are already being lined up. If successful, the project could bring needed genetic diversity to the endangered species. And it marks another promising advance in the wider effort to use cloning to retrieve an ever-growing number of species from the brink of extinction. The black-footed ferret, the first species to be reintroduced to former habitats with the help of artificial insemination, has long been a model species for new conservation technologies. So it is fitting that the ferrets have become the second species to be cloned for this type of genetic rescue. 【词汇过关】 请写出下面文单词在文章中的中文意思。 1.milestone [ˈmaɪlstəʊn] n. ____________________________ 2.native [ˈneɪtɪv] adj. ____________________________ 3.endangered