Unit3 topic talk-【新教材】2021-2022学年高中英语北师大版(2019)选择性必修第一册讲义（教师版+学生版）

选择性必修一Unit3 Topic talk 1．conservation n．保护 →conserve vt．保护；节省，节约 2．destroy vt．破坏；毁掉→ destruction n．摧毁；毁灭；破坏→ destructive adj．毁灭性的 3．mining n．采矿业→ mine v．开矿，采矿 n．矿井，矿 4．recycle vt．& vi．再利用，回收利用→recycling n．[U]回收利用→recyclable adj．可回收利用的→recyclable adj．可回收利用的→unrecyclable adj．不可回收的 5．informative adj．有教育意义的；知识性强的→inform v．通知；通告→information n．信息 6．threat n．威胁；(灾难等坏事)发生的可能→threaten vt.威胁到，危及；威胁，恐吓→threatened adj.受到威胁的→threatening adj.带有威胁的 7．illegally adv．非法地，违法地→ legal adj．合法的→legally adv．合法地→illegal adj．非法的 8．hunt vi. & vt. 猎取，猎杀→ hunting n．打猎→hunter n．猎人 9．extinct adj．灭绝的，绝种的→extinction n．灭绝 10． incredibly adv．非常地，极端地→incredible adj．难以置信的 11．urgent adj.紧急的，急迫的→urgently adv．紧急地→urgency n．紧急情况 重点单词与短语精析 ★课标词 ▲高频词 ★1.threat n.[C,usually sing.]构成威胁的人，形成威胁的事物；(灾难等坏事)发生的可能；[C,U]威胁，恐吓 【用法归纳】 pose a threat to... 对……构成威胁 under threat 受到威胁 ▶Drunken drivers pose a serious threat to other passersby.醉驾者对其他路人构成了严重的威胁。 ▶These ancient woodlands are under threat from new road developments.新道路开发可能对这些古老的林地造成破坏。 ▶Her parents made threats to take away her mobile phone if her grades couldn’t be improved. 她父母威胁说，如果她不能提高成绩，就要拿走她的手机。 【拓展】相关词语积累： threaten vt.威胁到，危及；威胁，恐吓 threatened adj.受到威胁的 threatening adj.带有威胁的 【练习】语法填空 ①(2019·江苏完形填空改编)Wildlife has been greatly threatened (threat) in the modern age. ②Floating ice around Iceland was becoming a threat to navigation. ③Some cultures see direct eye contact as impolite or threatening (threaten) behavior, while Americans see it as a sign of honesty. ④Bats are under threat in many areas of the world. The number of them has gone down to such a level that the remaining members may not be enough to keep the species. ▲★2.switch 【用法归纳】 (1)vt.& vi. (使)改变；vt.交换，转换，对调 switch (from A) to B （由A）转变成B switch off/on 关/开（电灯、机器等） switch