人教版（新课程标准）选修八Unit 3 Inventors and inventions复习课件(共69张PPT)

(共69张PPT)
背相关短语 get (sth.) across (to sb.) 使(某事)被(某人)理解
get along with sb. 与某人相处；进展
get away with sth. 携某物潜逃； 不因某事受惩罚
get down to (doing) sth. 开始做某事；认真处理某事
get over　　　　 熬过；克服(困难)；从……中恢复过来
背写作佳句 ①A smile can help us get through difficult situation and find friends in a world of strangers.
一个微笑可以帮助我们度过困境，并在陌生人的世界里找到朋友。
②(2019·全国卷Ⅰ书面表达)As an out-going boy, I get along well with almost everyone around.
作为一个外向的男孩，我几乎与我身边的每个人都相处得很好。
学案(三)　高考语篇的价值发掘——提升学科素养
2020·天津5月高考·阅读理解C篇——对接课标主题：科技发展与信息技术创新，科学精神，信息安全
Transport has a lot to answer for when it comes to harming the planet. While cars and trains are moving towards greener, electric power, emissions from air travel are expected to increase massively by 2050. If we want big green sky solutions, we need blue sky thinking. Fortunately, there's plenty of that happening right now, particularly the short-haul flights powered by batteries.
Harbour Air is the largest seaplane airline in North America, flying 30,000 commercial flights in 40 seaplanes each year. Significantly, all Harbour Air routes last less than 30 minutes, making it perfectly fit for electric engines. “As an airline, we're currently in the process of turning all our planes into electric airplanes，” says CEO Greg McDougall. To make this happen, the airline has partnered up with MagniX to create the world's first commercial flight with an electric engine.
Making the skies electric isn't just good for the environment; it also makes sound financial sense: a small aircraft uses $400 on conventional fuel for a 100-mile flight, while an electric one costs $8－12 for the same distance, and that's before you factor in the higher maintenance costs of a traditional engine. There's also the added bonus that electric planes are just much more pleasant to fly in. No loud engine noise, no smell of fuel, just environmentally friendly peace and quiet.
While there has been real progress in the e-plane industry, the technical challenges that remain are keeping everyone's feet firmly on the ground. A battery, even a lithium one, only provides 250 watt-hours per kilogram; compare this to liquid fuel, which has a specific energy of 11,890 watt-hours per kilogram. Carrying adequate batteries, however, would make the plane too heavy to get off the ground. In aircraft, where every bit of weight counts, this can't just be ignored.
The transition (过渡) from gas to electric in the automobile industry has been made easier by hybrids — vehicles powered by both fuel and electricity. Many believe the same pattern could be followed in the air. Fuel consumption could be reduced as the electric component is switched on at key parts of the journey, especially on take-off and landing.
It's certainly an exciting time for electric flying. With companies like Harbour Air taking the lead, battery-powered planes, especially on short-haul journeys, are set to become a reality in the next few years.
?好题不厌百回做，每做一次都有新发现
语篇解读：本文是一篇说明文。文章讲述了在空运中，尤其是在短途空运中使用电能作为能量来源的可能性、好处、存在的挑战以及解决办法。
1．According to Para.1, what is happening in air transport
A．New explorations of the sky are being launched.
B．Pollution caused by batteries is being controlled.
C．Efforts are being made to make air travel greener.
D．Demand for short-haul flights is increasing massively.
解析：细节理解题。根据第一段最后一句可知，幸运的是，人们正在构思解决空运产生的环境污染的方法，如由电池提供动力的短程航班，即现在人们正在努力让空中旅行变得更加环保，故C项正确。
答案：C　
2．Why is Harbour Air fit for electric flights
A．It runs short routes.
B．It has a strong partner.
C．Its planes can land on the sea.
D．It has planes with powerful engines.
解析：细节理解题。根据第二段第二句可知，Harbour Air适合使用电能提供动力的飞机的原因是它所有航线的航行时间都不超过30分钟，换句话说就是航线短，故A项正确。
答案：A　
3．The expression “added bonus” refers to the fact that electric planes .
A．give passengers more pleasant views
B．bring airlines more financial benefits
C．offer more enjoyable flying experiences
D．cost less in maintenance than traditional ones
解析：词义猜测题。根据画线词所在句可知，“that electric planes are just much more pleasant to fly in”是同位语从句，解释说明“added bonus”的内容，而电动飞机飞行时没有发动机的噪声，没有燃油的气味，只有安静，这使人们能够获得更加愉悦的飞行体验，故C项正确。
答案：C　
4．What might be the biggest challenge of electric flying
A．To improve the ground service for e-planes.
B．To find qualified technicians for the e-plane industry.
C．To calculate the energy needed to power e-planes.
D．To balance power and weight of batteries in e-planes.
解析：推理判断题。根据第四段最后两句可知，如果携带充足的电池，飞机就会过重而无法起飞，由此可知，平衡电池重量与电量是电力飞行面临的最大挑战，故D项正确。
答案：D　
5．What could be done during the transition from gas to electric in air flight
A．To produce new electric components.
B．To increase battery consumption.
C．To use mixed-power technology.
D．To expand the landing field.
解析：细节理解题。根据倒数第二段可知，许多人认为，燃料和电力同时供能这种模式，即混合型供能技术可以运用在空运中，故C项正确。
答案：C　
6．What is the author's attitude towards the prospect of electric flying
A．Short-sighted.　　　 B．Wait-and-see.
C．Optimistic. D．Skeptical.
解析：观点态度题。根据最后一段的内容可知，作者认为电力飞行，尤其是短途旅行中的电力飞行一定会在接下来的几年中成为现实。由此推知，作者对电力飞行持乐观态度，故C项正确。
答案：C　
?文本精读固基础，高考强调基础扎实
(一)由文本积阅读词汇
1．emission n．　　　　　　　 _____
2．massively adv. _______
3．solution n. _________
4．battery n. _____
排放
大量地
解决方案
电池
5．significantly adv. _______
6．currently adv. _____
7．conventional adj. _______
8．maintenance n. _____
9．bonus n. _______________
显著地
目前
传统的
维护
意外收获；奖金
B
D
A
C
(三)由文本积主题词块
1．the short-haul flights 　　　 _________
2．commercial flights _________
3．in the process of ____________
4．partner up with ___________
5．the technical challenges _________
短途航班
商业航班
在……过程中
与……合作
技术挑战
6．get off the ground _____
7．the automobile industry _________
8．fuel consumption _________
9．take-off and landing ___________
10．take the lead ___________
起飞
汽车行业
燃料消耗
起飞和降落
带头；带领
(四)用文本词汇替换蓝体词汇
1．Here in the United States, genetically engineered crops have been grown on a large scale since the mid-1990s. _________
2．The Internet has dramatically changed the way people express their views.
____________
3．We want to cooperate with both the administration and Congress.
______________
massively
significantly
partner up with
(五)在语境中悟微点语法
1．Transport has a lot to answer for when it comes to harming the planet.
分析：句中when it comes to是状语从句，意为：________________________。
[对点练]　完成句子
①______________________________________, it's better to leave well alone.
遇到别人争论时，最好别插嘴。
②_______________________ , the chemical industry is a major offender.
谈到环境污染问题，化工产业是一大祸害。
当谈到……时；就……而论
When it comes to other people's arguments
When it comes to pollution
2．In aircraft, where every bit of weight counts, this can't just be ignored.
分析：句中______引导的是地点状语从句。
[对点练]　完成句子
①__________________ , there is a way.
有志者，事竟成。
②We should go___________________.
我们应当到需要我们的地方去。
③_____________ , there are crowds of people waiting to see her.
她所到之处都有成群的人等着见她。
where
Where there is a will
where we are needed
Where she goes
(六)在语境中赏表达之美
1．(赏结构之美)Carrying adequate batteries, however, would make the plane too heavy to get off the ground.
赏析：句子的主语是动名词短语，宾语补足语部分采用了“_________ (太……不能……)”结构。整个句子结构紧凑、逻辑清晰、内容丰富。
too ...to ...
[对点练——完成句子]
①___________________ is good to our health.
多做锻炼有利于我们的健康。
②___________________________; besides, it is raining outside now.
我现在太累了不能出去散步，况且外面正在下雨。
③______________________ was_______________________________ .
走这么远的路对她来讲太有挑战性而无法完成。　　
Doing much exercise
I am too tired to go for a walk
Walking such a long way
too challenging for her to complete
2．(赏用词之美)No loud engine noise, no smell of fuel, just environmentally friendly peace and quiet.
赏析：句子言简意赅地呈现了电动飞机的额外的好处——没有巨大的引擎噪音，没有燃油的气味，只有环保与宁静。严格来讲，这不是一个规范的句子。但是顺承上文，采用短语的形式突出了电动飞机的优势，给读者留下深刻印象。
3．(赏意境之美)With companies like Harbour Air taking the lead, battery-powered planes, especially on short-haul journeys, are set to become a reality in the next few years.
赏析：电动飞机将在未来几年成为现实(尤其是短途飞行)，不由让人浮想联翩，欲先乘为快。
4．(赏修辞之美)If we want big green sky solutions, we need blue sky thinking.
赏析：句子用green和blue两个表示颜色的词指代环保，突出环保的本质特征，增强语言的形象性，使文笔简洁精炼，形象突出、特点鲜明。
“课下主题训练”见“课下主题训练（三）”
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