外研版（2019）选择性必修第二册 Unit5 A delicate world高频词汇课件（一）(共28张PPT)

(共28张PPT)
Unit 5
高频词汇学习(一)
设计说明
本课件依据新教材和新课标的要求，将中英文中思维差异大、高考出现频率高、词义较多、用法灵活的词汇进行了汇总和精讲。
特点创新趣味性导入、追本溯源记单词、多重维度复现单词、遗忘曲线精准练单词、深度学习记忆单词
模块每个词的呈现同中有异，包含导入、详情和练习三个主要模块。具体分为情境导入、词根溯源、语义网络图、精准释义、常见搭配、词块例句、高考链接、学后练习等方面
Unit5 高频词汇一览
rare adj.
conservation n.
trap n.&v.
导入
详情
练习
精准释义
词汇拓展
高考链接
词块例句
rare
rare adj.
词源
导入
rare [re (r)] adj.
看图，想一想rare是什么意思呢？
rare 罕有的，罕见的
来自拉丁语 rarus,稀疏的，薄的，松散的，来自 PIE*ere,分开，网，词源同 retina,reticulate. 引申词义罕有的，罕见的。
词源
精准释义
adj. 稀有的;珍贵的;稀少的;稀罕的;半熟的;半生的
词块例句
a rare disease 罕见的疾病
a rare occurrence罕见的事件
a rare sight罕见的疾病 / 事件；难得一见的事物
It must be stressed that this disease is very rare. 必须着重指出，这种病非常罕见。
The bird is now a rare sight in this country. 如今在这个国家，这种鸟已罕见了。
It's extremely rare for it to be this hot in April.四月份就这样炎热是极其罕见的。
rare
词汇拓展
比较级： rarer 最高级： rarest
熟词生义“(肉) 半熟的、半生的”
派生词：rarely
Port Lympne Reserve, which runs a breeding (繁育) programme, has welcomed the arrival of a rare black rhino calf (犀牛幼崽).(高考 全国甲卷 2021 阅读)
While they are rare north of 88°,there is evidence that they range all the way across the Arctic, and as far south as James Bay in Canada.(高考 广东卷 2019 语法填空)
该词在历年高考真题中出现32次
高考链接
练习
写出下列句子中划线部分的汉语意思。
1.It remained an exceptionally rare book until it was reprinted in 1918.
2. It was a rare pleasure to see him in action.
3. As we approached the summit we were vouchsafed a rare vision.
罕见
享受
难得一见的
导入
详情
练习
精准释义
词汇拓展
高考链接
词块例句
conservation
conservation n.
词源
导入
conservation [ k ns ve n] n.
看图，想一想conservation是什么意思呢？
con 加强 + serv 服务；保持 + ation 状态 → 保存；保持
词源
精准释义
n. (对自然环境的)保护;(官方对历史或艺术建筑的)保护;文物保护;防止流失(或浪费、损害、毁坏);保持;保护
词块例句
to be interested in wildlife conservation对野生动物保护感兴趣
The benefits of conservation are both financial and aesthetic. 保护自然环境在经济上和美化环境上都有好处。
Cheaper energy conservation techniques have been put into operation in the developed world. 更经济的节能技术在发达国家已经投入使用。
词汇拓展
记忆技巧：con 加强 + serv 服务；保持 + ation 状态 → 保存；保持
serve→reserve→preserve
conserve→conservation
同根词：preserve, observe, reserve
词族：conserve, conservation, conservationist
Bird Conservation Fund to purchase wetlands and wildlife habitat for inclusion into the National Wildlife Refuge System — a fact that ensures this land will be protected and available for all generations to come.(高考 全国新高考I卷 2021 阅读)
Little wonder the Federal Duck Stamp Program has been called one of the most successful conservation programs ever initiated.(高考 全国新高考I卷 2021 阅读)
该词在历年高考真题中出现16次
高考链接
练习
单句语法填空。
1.The zoo is doing major ____________ (conserve) work, both in captivity and in the field.
2. My father's life work was devoted to the ____________ (conserve) of the Longleat estate.
conservation
conservation
trap
导入
详情
练习
精准释义
trap n.&v.
高考链接
词块例句
词源
语义网络图
导入
trap [tr p] n.&v.
《生活大爆炸》中Sheldon多次引用“It’s a trap!”，模仿《星球大战》中的阿克巴上将。
《星球大战6（绝地归来）》中，阿克巴上将在一次战役归来时发现自己中了帝国伏击舰队的圈套，说出了 “It’s a trap!（这是个陷阱）”。阿克巴上将这句略带喜感的台词后来成为了经典，被广大《星球大战》的粉丝所熟知。
词源
trap 陷阱，罗网，圈套
来自古英语 traeppe,陷阱，罗网，来自 Proto-Germanic*trep,踩踏，来自 PIE*der,走，跑，步 行，词源同 trip,tramp,tread.词义通俗化为圈套。
陷阱
trap
（基本义）
困住动物的“陷阱”
（捕鸟兽的）陷阱；夹子；罗网
牢笼；困境
设陷阱捕捉；夹住；卡住
n
困住人的困境 / 状态
困住人的“陷阱”
（陷害人的） 圈套；诡计
把……困住；使陷入困境
v
语义网络图
精准释义
n.[C]（捕鸟兽）陷阱；夹子；罗网
n.[C]陷害人的）圈套；诡计
n.[C]牢笼；困境
vt.设陷阱捕捉；夹住；卡住
vt.把……困住；使陷入困境
vt.留存；储存（气体 / 水等）
They walked right into a booby-trap and got blown to smithereens.他们正好踩上了饵雷，结果被炸得粉身碎骨。
He failed to keep a rendezvous after sensing a police trap.他察觉到警方设了圈套以后就没有如约会面。
The team posed as drug dealers to trap the ringleaders.该队队员装扮成毒品贩子，诱捕罪犯头目。
Were you just trying to trap her into making some admission 你刚才是想诱使她供认吗？
I would hate him to think I'm trying to trap him.我不愿让他以为我是在给他设圈套。
词块例句
We succeed in our field of specialization and then become trapped in it.(高考 天津卷 2019 阅读)
Grace lost her tail as a baby when she got caught up in a fish trap.(高考 北京卷 2013 阅读)
Sibson realized he was trapped (困住).(高考 四川卷 2012 完型)
该词在历年高考真题中出现14次
高考链接
一、根据句意选出trap的最佳释义。
_______ 1. She set a trap for him and he had walked straight into it.
_______ 2. The only way to catch mice is to set a trap.
_______ 3. I’ll describe some situations that commonly arise between teenagers and parents and then suggest some ways out of the trap.（2010 湖北改）
练习
a.（捕捉鸟兽的）陷阱；夹子；罗网
b.（陷害人的）圈套；诡计
c. 牢笼；困境
b
a
c
二、根据句意写出下列句子中trap的汉语释义。
1. She felt trapped in her role of wife and mother. __________
2. The consequences could be serious if we don’t keep reducing emissions of CO2 and other greenhouse gases that are trapping heat in our atmosphere.（2009 福建改） __________
3. I was trapped into signing my name. _________________
练习
使陷入困境
储存
使中计 / 使陷入圈套