人教版2020高考英语一轮题型练Unit20NewFrontiers(含解析)北师大版选修7

选修7U20

李仕才

一、阅读理解 A

Old Fossils

Scientists have found what they think is probably the oldest fossil on Earth, a remnant of life from 3.7 billion years ago when Earth’s skies were orange and its oceans green. In a newly melted part of Greenland, Australian scientists found the leftover structure from a community of microbes（微生物）that lived on an ancient seafloor. Based on their analysis of the fossils, the researchers determined that they are 220 million years older than those discovered in Western Australia, which were 3.48 billion years old.

The discovery shows life may have formed quicker and more easily than once thought, about half a billion years after Earth formed. And that may also give hope for life forming elsewhere, such as Mars, said study co-author Martin VanKranendonk of the University of New South Wales and director of the Australian Center for Astrobiology. ＂It gives us an idea how our planet evolved and how life gained a foothold,＂ VanKranendonk said.

Scientists had thought it would take at least half a billion years for life to form after the molten Earth started to cool a bit, but this shows it could have happened quicker, he said. That’s because the newly found fossil is far too complex to have developed soon after the planet’s first life forms, he said.

In an outcrop of rocks that used to be covered with ice and snow which melted after an exceptionally warm spring, the Australian team found stromatolites（叠层石）, which are layered structures that are often produced by a community of microbes. The stromatolites were about 1 to 4 centimeters high.

＂It is like the house left behind made by the microbes,＂ VanKranendonk said. ＂Scientists used the layers of ash from volcanoes and tiny zircon（锆石） with uranium and estimated that they date back to 3.7 billion years ago.＂

The dating seems about right, said Abigail Allwood, a NASA astrobiologist who found the previous oldest fossil, from 3.48 billion years ago, in Australia. But Allwood said she

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is not completely convinced that what VanKranendonk’s team found once was alive. She said the evidence wasn’t conclusive enough that it was life and not a geologic quirk（地质巧合）. ＂It would be nice to have more evidence, but in these rocks that’s a lot to ask,＂ Allwood said in an email.

1. The underlined words ＂gained a foothold＂ in Paragraph 3 mean______. A.continued C.increased

B.changed D.Started

2. We can learn from Paragraph 4______.

A.the fossil appeared soon after the birth of the earth B.the fossil formed soon after the earth’s first life C.life formed earlier than the newly found fossil D.life appeared about half a billion years ago

3. What is Abigail Allwood’s attitude towards the newly found fossil? A.Neutral. C.Objective.

B.Sceptical.

D.Supportive.

4. According to the passage, ______. A.the previous fossils are a geologic quirk

B. the previous fossils are made up of stromatolites C. the newly found fossils come from Western Australia D. the newly found fossils have a history of 3.7 billion years 【语篇解析】文章介绍科学家发现距今37亿年前的化石。

1. D【解析】词义猜测题。根据文章第三段的句子＂It gives us an idea how our planet evolved＂这让我们了解 星球是怎么形成的，下文是生命是怎么开始的。可知，＂gained a foothold＂ 意为＂开始＂。故选D。

3. B【解析】 观点态度题。根据文章最后一段的句子＂She said the evidence wasn’t conclusive enough that it was life and not a geologic quirk(地质巧合).＂可知，Abigail Allwood 对于新发现的化石态度是怀疑的。故选B。

4. D【解析】细节理解题。根据文章第一段的句子＂remnant of life from 3.7 billion years

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ago＂和第二段的句 子＂the researchers determined that they are 220 million

Australia, which were 3.48 billion

years older than those discovered in Western

years old.＂可知，新发现的化石有37亿年历史。故选D。

B

(2017·江西重点中学盟校高三模拟)Watch the countryside fly by as you travel by superfast Eurostar from London or Kent, through the Channel Tunnel and direct to the Heart of the Magic.Once there, enjoy this extraordinary world of fun, laughter, and magic.

Day One

Board the direct Eurostar service to Disneyland Paris.When you arrive, a free shuttle bus will take you to your hotel to check in. Once you’ve settled, why not head to Disney Village—the resort’s lively entertainment centre? This evening, dine in the hotel or in one of the restaurants in Disney Village, and look forward to the days ahead.

Day Two

Enjoy a fantastic full day at Disneyland Paris, and take advantage of your Extra Magic Hours as specific areas of Disneyland Park open up to two hours earlier for Disney Resort Hotel guests.At the end of a wonderful day, head back to your hotel or into Disney Village.

Day Three

Return to the Disney Parks for another day of thrills.Your special Hopper Ticket gives you unlimited admission to both Disneyland Park and Walt Disney Studios Park during opening hours, and you can plan your visit using the Park Timetables and Fastpass system to shorten your wait at popular rides.

Day Four

Check out of your hotel this morning, and use the hotel’s left luggage facility to make the most of your last day at Disneyland Paris.Your Eurostar departs this evening, so you’ll have plenty of time to make the most of the magic of Disney Village before beginning your journey home.

【解题导语】 本文是一篇广告。乘坐欧洲之星列车去巴黎迪士尼乐园吧！巴黎迪士尼乐园充满欢笑与神秘。文中介绍了巴黎迪士尼乐园之游的日程安排。

1．How do travelers go to Disneyland Paris? A．By air.

B．By ship.

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C．By train. D．By coach.

C 解析：推理判断题。根据第一段中的“Watch the countryside fly by as you travel by superfast Eurostar from London or Kent，through the Channel Tunnel”可推知，游客乘坐火车去巴黎迪士尼乐园。

2．What are travelers advised to do after checking in at their hotel? A．Go to Disney Village. B．Dine in the hotel.

C．Prepare for the days ahead. D．Have a good rest.

A 解析：细节理解题。根据第二段中的“Once you’ve settled，why not head to Disney Village—the resort’s lively entertainment centre？”可知，对游客的建议是在酒店登记入住后去娱乐中心Disney Village。

3．What can be used to save time in Disneyland Paris? A．Extra Magic Hours. B．The Hopper Ticket. C．The Eurostar Ticket.

D．The Park Timetables and Fastpass system.

D 解析：细节理解题。根据第四段中的“you can plan your visit using the Park Timetables and Fastpass system to shorten your wait at popular rides”可知，游客可利用Park Timetables and Fastpass system节约时间。 C

Doctors in hospital emergency rooms often see accidental poisonings. A frightened parent arrives with a child who swallowed a cleaning liquid. Or perhaps the harmful substance is a medicine. Or it might be a chemical product meant to kill insects. These are common causes of accidental poisoning.

In cases like this, seek medical help as soon as possible. Save the container of whatever caused the poisoning. And look on the container for information about anything that stops the effects of the poison. Save anything expelled from the mouth of the victim. That way, doctors can examine it.

Millions of people know a way to save a person who is choking on something trapped in the throat. The method is commonly known as the Heimlich Maneuver or abdominal thrusts(腹部按压), which you can do by getting directly behind a sitting or standing

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