高中英语 外研版（2019）必修三 Unit 3 Period 3 同步练习
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| 名称 | 高中英语 外研版（2019）必修三 Unit 3 Period 3 同步练习 |  | |
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| 科目 | 英语 | ||
| 更新时间 | 2022-12-06 12:34:51 | ||
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中小学教育资源及组卷应用平台
Unit 3 The world of science
Period 3
[层级一 小题夯基练]
维度一 品句填词
1．Listening is thus an active, not a (被动的) behavior, consisting of hearing, understanding and remembering.
2．They were making efforts to provide (精确的) weather forecasts during the Olympic Games.
3．As we know, language is one of the (重要的) means for mankind to convey thoughts and feelings.
4．Scientists all over the world have been looking for (疗法) for cancer for many years.
5．Not only can it exercise flexibility, but also it can help develop physical and (精神的) health.
6．Yuan Longping has won many awards, which shows his (非凡的) achievements.
7．Now his aim is to be a (化学家) and make a breakthrough in this field.
8．China has a long history of culture and the places of its (起源) are the areas of the Yangtze River and the Yellow River.
9．The Amazon rainforest is about a hundred million years old, and it has more (物种) of animals and plants than any other place on earth.
10．We should apply (理论) to practice.
维度二 词形转换和动词的形式变换(用所给词的正确形式填空)
1．Parents attach much__ (significant) to education. They will do their best to give their children that priceless gift.
2．The sports meeting, which was (original) due last Friday, was finally delayed because of the bad weather.
3．Recent advances in medical science mean that this illness can __ (cure) now.
4．The woman (injure) in the car crash is still under treatment in hospital.
5．In my opinion, really happy people belong to those who are physically and (mental) healthy.
维度三 单句语法填空
1．Great changes ____ (take) place in my hometown and a lot of factories __ __ (set) up there in the past ten years.
2．The book __ __ (finish) and will come out next month.
3．Up to now, a large number of schools __ __ (build) in this area.
4．More than 5，000 used bikes __ __ (collect) since the two brothers set up the organization.
5．—Why did you leave that position
—I __ (offer) a better position at IBM.
6．Professor Yang __ __ (invite) to the film festival twice so far.
维度四 完成句子
1．当你把试卷拿回来的时候， 要特别注意做了标记的内容。
When you get the paper back, pay special attention to __ __ __ ．
2．纸币已被使用了1 000多年了。
Paper money __ __ for over one thousand years.
3．在过去的几年里， 世界各地已经制作了数千部电影。
In the last few years, thousands of films __ __ all over the world.
4．你的任务一完成你就可以回家。
You can go home as soon as your task __ __ .
5．新的订票制度已经在使用中。
The new booking systems for tickets __ __ ．
维度五 书法与写作
请临摹之后再利用课余时间背诵。
INCLUDEPICTURE "../../../EDP19+.TIF" \* MERGEFORMAT INCLUDEPICTURE "../../../EDP19+.TIF" \* MERGEFORMAT
提醒：①每个字母圆润饱满，压线书写；②宜用0.5或0.7 mm中性笔。
[层级二 语篇提能练]
Ⅰ.阅读理解
A
William Kamkwamba lives in Malawi, Africa, where most people have to grow their own food and have no electricity or running water. When he was 14 years old, there was a terrible drought (干旱) and most families, including William's, couldn't grow enough food.
Because of the drought, William's family couldn't afford to send him to school any more. So one day, William went to the library near his home to study. He found a science book called Using Energy, which included instructions for building a windmill (风车). Windmills are good sources of electricity, and they can bring water up from underground. William didn't know much English, and he wasn't able to understand most of the book, but it was full of pictures. Looking at the pictures, William thought he could build a windmill for his family.
When William started building his windmill, a lot of people laughed at him, including his mother. But William saw the photo of the windmill in the book. That meant someone else was able to build it, so he knew he could build it, too. He didn't have the parts and equipment that he saw in the book's pictures. So he looked for parts in junkyards to build his machine.
William changed his design little by little. First, the windmill powered only one light bulb (灯泡). Finally, it powered four lights. Then there was enough electricity for four lights and a radio. No one laughed at William after that, and people in his town started to come to his house to get power for their cellphones. Later, William built a second windmill. This one brought water up from underground. After that, William began to teach other people how to build windmills.
Now he uses his website, movingwindmills.org to educate and give hope to people. His main message is this：To the Africans and the poor who are struggling (挣扎) with your dreams ...trust yourself and believe. Whatever happens, don't give up.
【解题导语】 本文是一篇记叙文。马拉维少年威廉·坎库温巴为了解决家乡的干旱问题不言放弃，最终发明出可发电、可抽地下水来灌溉的风车。
1．What was William's primary purpose of building a windmill
A．To set up a family business.
B．To do a science experiment.
C．To realize his childhood dream.
D．To bring electricity to his family.
2．What was William's mother's attitude towards his building a windmill at first
A．Hopeful. B．Worried.
C．Doubtful. D．Uninterested.
3．What can we learn about William's first windmill
A．It was sold at a high price.
B．It was made of thrown away things.
C．It could bring water up from underground.
D．It looked the same as the photos in Using Energy.
4．Which of the following can best describe William
A．Honest. B．Humorous.
C．Self centered. D．Strong minded.
B
Google's new camera, called Clips, is a smart device. It comes with a case that has a clip (夹子), but it's not designed to be worn on your clothing. Most interestingly, it uses artificial intelligence to take photography out of your hands and captures moments entirely on its own!
What sets this roughly 2 inch by 2 inch camera, with a three hour battery life and Gorilla Glass for toughness apart is that it is specially intended for moments, like when a child does something cute that may happen too quickly for you to pull out your smartphone.
The Clips device uses machine learning algorithms (计算程序) to help capture scenes. Those algorithms include face recognition. “Once it learns that there's a face you see frequently, it'll try to get nice photos of those faces，” said Juston Payne, the device's product manager. And they also want it to recognize facial expressions, which involved “training it to know what happiness looks like”. The Google team also trained it to recognize what not to shoot—like when a child's hand is over the lens, or if it is tossed in a dark purse.
The only way to see the images is by connecting the camera with your phone, as it has no screen for viewing or editing.
Concerned it could seem strange Yes, Payne admitted, but he said they addressed that by making it obvious what it is. A green light on the front signals that it is on. Besides, unlike a camera meant to monitor your home, it is not connected to the Internet.
“This product is only possible because of the way that silicon (硅) has advanced.” Payne said that now they could squeeze the technology down into a device this size. Going forward, we're likely to get more assistance from the artificial intelligence packed into our apps and gadgets.
【解题导语】 谷歌公司推出了一款新的照相机，文章对照相机的各种功能和使用进行了介绍。
5．What is the most outstanding feature of Clips
A．It enables easy Internet access.
B．It is equipped with tough glass.
C．It can be worn on your clothing.
D．It allows of hands free photography.
6．What does the underlined word “candid” in paragraph 2 mean
A．Awkward. B．Brief.
C．Touching. D．Unforgettable.
7．What makes Clips a reality according to Juston Payne
A．The advance in technology.
B．The popularity of the Internet.
C．The screen for viewing and editing.
D．The rise of the smartphone industry.
8．What does the passage mainly talk about
A．New gadgets in the age of apps.
B．Artificial intelligence in daily life.
C．A new digital camera from Google.
D．An alternative way to photograph.
Ⅱ.七选五
Characteristics of an Excellent Scientist
The Free Dictionary defines a scientist as a person having professional knowledge on one or more sciences, especially natural science or physical science. 1.________ Let's look at some characteristics of an excellent scientist.
Curiosity
2．________ Scientists such as Thomas Edison and George Westinghouse discovered things mainly because they wanted to know how things work. If a scientist doesn't have the drive to ask questions or even wonder, then he/she never gets to the first stage of the scientific process.
Patience
3．________ There are very few jobs that take longer than this one. Even if you think you have received some education on science, you still have a lot of scientific researches to do. If you're an instant gratification (及时满足的) type of person, this may not be the best choice for you.
Ethical (道德的) qualities
In order to truly discover and use knowledge for the greater good, a scientist must have a desire to improve people's life as well as the environment and living things, since they are all linked and they can affect one another in the long run. A scientist must report findings honestly regardless of personal or outside commercial (商业的) interests. Sticking to an old belief without evidence is dishonest. 4.________
Working habits
An excellent scientist even takes notes of the smallest observation, keeping it in mind and recording it. 5.________ He/She also needs to communicate thoughts on paper and verbally. Networking skills connect him/her with colleagues working on similar projects where he/she may discover something new.
A．Becoming a scientist takes a long time.
B．An excellent scientist must be very curious about things.
C．It also defines a scientist as someone who uses scientific methods.
D．However, that belief shouldn't be changed without powerful evidence.
E．He/She can work well alone or in groups, depending on what's needed.
F．To make discoveries in human knowledge, you have to think differently.
G．One of the main places that many scientists work in is the research laboratory.
【解题导语】 文章介绍了成功的科学家的性格特点。
Ⅲ.语法填空
Rome wasn't built in a day. Nearly two decades have passed since China launched the first Beidou satellite in 2000. Since then, more Beidou satellites have been sent into orbit, 1. ____________(form) the Beidou Navigation Satellite System (BDS)．
In late 2012, BDS 2.____________(begin) providing services to people in China and other parts of the Asia Pacific region. At the end of 2018, it started to provide global services. Now with two more Beidou satellites 3.____________(launch) on Dec.16, 2019, BDS has 53 satellites in orbit. It 4. ____________(expect) to greatly improve the system's ability to serve 5. ____________(user) worldwide.
Although a satellite based navigation system needs only 24 satellites to run 6.____________(proper), having 53 allows for better coverage.
This is 7.____________ it works: a signal receiver on Earth measures its distance from at least three satellites by recording the amount of time it takes 8. ____________(receive) their signals. Then it can calculate its location. With so many satellites, BDS can provide 9. ____________more accurate calculation. While GPS provides meter level positioning accuracy, BDS reduces the error 10.____________ centimeters. This service is especially useful for land surveying, mapping, agriculture and automated driving.
Future plans call for a smarter and more accessible system with Beidou at its core, to come online by 2035. By then, we can probably say that Rome has finally been built.
【解题导语】 本文是一篇说明文。文章介绍了我国自主研发的北斗定位系统， 包括其发展、作用、运行模式、优势等。
参考答案
[层级一 小题夯基练]
维度一 品句填词
1．passive.
2．accurate.
3． significant.
4．cures.
5．mental.
6．extraordinary
7．chemist.
8．origin.
9．species.
10． theory.
维度二 词形转换和动词的形式变换(用所给词的正确形式填空)
1．_significance
2．originally.
3． be__cured.
4． injured.
5． mentally.
维度三 单句语法填空
1． have____taken have__been__set.
2． has__been__finished.
3． have__been__built.
4． have__been__collected.
5．was__offered.
6．has__been__invited.
维度四 完成句子
1．what__has__been__marked．
2． has__been__used.
3．have__been__produced.
4． has__been__finished.
5． have__been__used．
维度五 书法与写作
提醒：①每个字母圆润饱满，压线书写；②宜用0.5或0.7 mm中性笔。
[层级二 语篇提能练]
Ⅰ.阅读理解
A
1．
D 解析：推理判断题。根据第一段中的have no electricity or running water和第二段中的“William thought he could build a windmill for his family”可知，威廉造风车的初衷是给家里发电。
2．
C 解析：观点态度题。根据第三段中的“a lot of people laughed at him, including his mother”可知，一开始他的妈妈也不相信威廉能造出风车。
3．
B 解析：细节理解题。根据第三段中的“He didn't have the parts and equipment that he saw in the book's pictures. So he looked for parts in junkyards to build his machine.”可知，威廉的第一个风车是由废弃的东西做的。
4．
D 解析：推理判断题。在威廉开始造风车时，很多人嘲笑他，但他仍然充满信心，并鼓励人们不要放弃梦想。由此可知，威廉是一个意志坚定的人。
B
5．
D 解析：细节理解题。根据第一段中的“Most interestingly, it uses artificial intelligence to take photography out of your hands and captures moments entirely on its own！”可知，谷歌开发的这款相机使用人工智能来拍照，不需要你手动按键，它就可以帮助你记录美好的精彩瞬间。故选D。
6．
B 解析：词义猜测题。根据第二段中的“like when a child does something cute that may happen too quickly for you to pull out your smartphone”可知，画线词所在句表示这款相机能解决手机不能及时抓拍小孩子所做的短暂又可爱的事的问题。candid moments意为“短暂的时刻”。故选B。
7．
A 解析：细节理解题。根据最后一段可知，这款相机依靠先进的科技和人工智能等使得它成了可以帮助人们记录美好瞬间的工具。故选A。
8．
C 解析：主旨大意题。通读全文尤其是第一段中的“Google's new camera, called Clips, is a smart device.”可知，谷歌开发了一款新的照相机，文章对照相机的各种功能和使用进行了介绍。故选C。
Ⅱ.七选五
1．C 解析：空前指出，字典将科学家定义为在一门或多门科学方面有专业知识的人，尤其是自然科学或物理科学。由此可知，此处讲的是对科学家这一名词的理解。故选C。
2．B 解析：根据此段小标题Curiosity可知，科学家们的一个特征是有好奇心。故选B。
3．A 解析：根据此段小标题Patience以及下文可知，成为科学家需要很长一段时间。故选A。
4．D 解析：空前一句提到，坚持一个没有证据支撑的陈旧观念是不诚实的。D项是对前一句的补充说明。故选D。
5．E 解析：根据此段小标题Working habits可知，本段谈论的是工作习惯。空前提到他们会记笔记，空后提到他们需要把他们的想法在纸上写出来或口头表达出来。E项指出，他们可以根据需要独立工作或团队合作，承接上文，引出下文。故选E。
Ⅲ.语法填空
1．forming 解析：考查非谓语动词。分析句子结构可知， 句中已有谓语动词have been sent，无连词，可推断空处应为非谓语动词， 在句中充当状语；空处与逻辑主语Beidou satellites之间是主动关系， 所以要用现在分词。故填forming。
2．began 解析：考查动词的时态。分析句子结构可知， 句中缺少谓语动词， 可推断空处充当谓语；根据时间状语In late 2012可知， 应该用一般过去时。故填began。
3．launched 解析：考查with的复合结构。分析句子结构可知，此处是“with＋宾语＋宾补”结构，空处与逻辑主语two more Beidou satellites之间是被动关系， 所以要用过去分词。故填launched。
4．is expected 解析：考查动词的时态和语态。分析句子结构可知， 句子缺少谓语动词， 可推断空处充当谓语；结合文章时态可知， 应该用一般现在时；主语It指的是BDS，与expect之间是被动关系， 所以要用一般现在时的被动语态。故填is expected。
5．users 解析：考查名词的复数。空处位于不定式to serve后面， 充当宾语， 且此处指的是全世界的用户，应该用复数形式， 泛指多个用户。故填users。
6．properly 解析：考查副词。空处位于非谓语动词to run后面， 起修饰作用， 修饰动词要用副词形式。故填properly。
7．how 解析：考查表语从句关系词。句意：这是它如何运作的(模式)。分析句子结构可知，句中有系动词is和谓语动词works，所以空处需要填入关系词；从句位于is后面，是表语从句；根据后文的描述可知，这里说明的是运行模式，所以要用关系副词how。
8．to receive 解析：考查固定句型。分析句子结构可知，句中含有省略关系词that/which的定语从句“it takes____________(receive) their signals”，修饰先行词time；此处考查固定句型it takes time to do sth.，意为“做某事花费多少时间”。故填to receive。
9．a 解析：考查冠词。句意：因为有这么多的卫星，北斗卫星导航系统可以提供一种更精确的计算结果。calculation在句中意为“计算结果”，是可数名词，前面没有限定词，不是特指，需要填不定冠词；more的发音以辅音音素开头。故填a。
10．to 解析：考查介词。句意：全球定位系统提供到米的定位精确度，而北斗卫星导航系统把误差减少到了厘米。根据句意可知，此处考查固定表达reduce to...意为“减少到……”。故填to。
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Unit 3 The world of science
Period 3
[层级一 小题夯基练]
维度一 品句填词
1．Listening is thus an active, not a (被动的) behavior, consisting of hearing, understanding and remembering.
2．They were making efforts to provide (精确的) weather forecasts during the Olympic Games.
3．As we know, language is one of the (重要的) means for mankind to convey thoughts and feelings.
4．Scientists all over the world have been looking for (疗法) for cancer for many years.
5．Not only can it exercise flexibility, but also it can help develop physical and (精神的) health.
6．Yuan Longping has won many awards, which shows his (非凡的) achievements.
7．Now his aim is to be a (化学家) and make a breakthrough in this field.
8．China has a long history of culture and the places of its (起源) are the areas of the Yangtze River and the Yellow River.
9．The Amazon rainforest is about a hundred million years old, and it has more (物种) of animals and plants than any other place on earth.
10．We should apply (理论) to practice.
维度二 词形转换和动词的形式变换(用所给词的正确形式填空)
1．Parents attach much__ (significant) to education. They will do their best to give their children that priceless gift.
2．The sports meeting, which was (original) due last Friday, was finally delayed because of the bad weather.
3．Recent advances in medical science mean that this illness can __ (cure) now.
4．The woman (injure) in the car crash is still under treatment in hospital.
5．In my opinion, really happy people belong to those who are physically and (mental) healthy.
维度三 单句语法填空
1．Great changes ____ (take) place in my hometown and a lot of factories __ __ (set) up there in the past ten years.
2．The book __ __ (finish) and will come out next month.
3．Up to now, a large number of schools __ __ (build) in this area.
4．More than 5，000 used bikes __ __ (collect) since the two brothers set up the organization.
5．—Why did you leave that position
—I __ (offer) a better position at IBM.
6．Professor Yang __ __ (invite) to the film festival twice so far.
维度四 完成句子
1．当你把试卷拿回来的时候， 要特别注意做了标记的内容。
When you get the paper back, pay special attention to __ __ __ ．
2．纸币已被使用了1 000多年了。
Paper money __ __ for over one thousand years.
3．在过去的几年里， 世界各地已经制作了数千部电影。
In the last few years, thousands of films __ __ all over the world.
4．你的任务一完成你就可以回家。
You can go home as soon as your task __ __ .
5．新的订票制度已经在使用中。
The new booking systems for tickets __ __ ．
维度五 书法与写作
请临摹之后再利用课余时间背诵。
INCLUDEPICTURE "../../../EDP19+.TIF" \* MERGEFORMAT INCLUDEPICTURE "../../../EDP19+.TIF" \* MERGEFORMAT
提醒：①每个字母圆润饱满，压线书写；②宜用0.5或0.7 mm中性笔。
[层级二 语篇提能练]
Ⅰ.阅读理解
A
William Kamkwamba lives in Malawi, Africa, where most people have to grow their own food and have no electricity or running water. When he was 14 years old, there was a terrible drought (干旱) and most families, including William's, couldn't grow enough food.
Because of the drought, William's family couldn't afford to send him to school any more. So one day, William went to the library near his home to study. He found a science book called Using Energy, which included instructions for building a windmill (风车). Windmills are good sources of electricity, and they can bring water up from underground. William didn't know much English, and he wasn't able to understand most of the book, but it was full of pictures. Looking at the pictures, William thought he could build a windmill for his family.
When William started building his windmill, a lot of people laughed at him, including his mother. But William saw the photo of the windmill in the book. That meant someone else was able to build it, so he knew he could build it, too. He didn't have the parts and equipment that he saw in the book's pictures. So he looked for parts in junkyards to build his machine.
William changed his design little by little. First, the windmill powered only one light bulb (灯泡). Finally, it powered four lights. Then there was enough electricity for four lights and a radio. No one laughed at William after that, and people in his town started to come to his house to get power for their cellphones. Later, William built a second windmill. This one brought water up from underground. After that, William began to teach other people how to build windmills.
Now he uses his website, movingwindmills.org to educate and give hope to people. His main message is this：To the Africans and the poor who are struggling (挣扎) with your dreams ...trust yourself and believe. Whatever happens, don't give up.
【解题导语】 本文是一篇记叙文。马拉维少年威廉·坎库温巴为了解决家乡的干旱问题不言放弃，最终发明出可发电、可抽地下水来灌溉的风车。
1．What was William's primary purpose of building a windmill
A．To set up a family business.
B．To do a science experiment.
C．To realize his childhood dream.
D．To bring electricity to his family.
2．What was William's mother's attitude towards his building a windmill at first
A．Hopeful. B．Worried.
C．Doubtful. D．Uninterested.
3．What can we learn about William's first windmill
A．It was sold at a high price.
B．It was made of thrown away things.
C．It could bring water up from underground.
D．It looked the same as the photos in Using Energy.
4．Which of the following can best describe William
A．Honest. B．Humorous.
C．Self centered. D．Strong minded.
B
Google's new camera, called Clips, is a smart device. It comes with a case that has a clip (夹子), but it's not designed to be worn on your clothing. Most interestingly, it uses artificial intelligence to take photography out of your hands and captures moments entirely on its own!
What sets this roughly 2 inch by 2 inch camera, with a three hour battery life and Gorilla Glass for toughness apart is that it is specially intended for moments, like when a child does something cute that may happen too quickly for you to pull out your smartphone.
The Clips device uses machine learning algorithms (计算程序) to help capture scenes. Those algorithms include face recognition. “Once it learns that there's a face you see frequently, it'll try to get nice photos of those faces，” said Juston Payne, the device's product manager. And they also want it to recognize facial expressions, which involved “training it to know what happiness looks like”. The Google team also trained it to recognize what not to shoot—like when a child's hand is over the lens, or if it is tossed in a dark purse.
The only way to see the images is by connecting the camera with your phone, as it has no screen for viewing or editing.
Concerned it could seem strange Yes, Payne admitted, but he said they addressed that by making it obvious what it is. A green light on the front signals that it is on. Besides, unlike a camera meant to monitor your home, it is not connected to the Internet.
“This product is only possible because of the way that silicon (硅) has advanced.” Payne said that now they could squeeze the technology down into a device this size. Going forward, we're likely to get more assistance from the artificial intelligence packed into our apps and gadgets.
【解题导语】 谷歌公司推出了一款新的照相机，文章对照相机的各种功能和使用进行了介绍。
5．What is the most outstanding feature of Clips
A．It enables easy Internet access.
B．It is equipped with tough glass.
C．It can be worn on your clothing.
D．It allows of hands free photography.
6．What does the underlined word “candid” in paragraph 2 mean
A．Awkward. B．Brief.
C．Touching. D．Unforgettable.
7．What makes Clips a reality according to Juston Payne
A．The advance in technology.
B．The popularity of the Internet.
C．The screen for viewing and editing.
D．The rise of the smartphone industry.
8．What does the passage mainly talk about
A．New gadgets in the age of apps.
B．Artificial intelligence in daily life.
C．A new digital camera from Google.
D．An alternative way to photograph.
Ⅱ.七选五
Characteristics of an Excellent Scientist
The Free Dictionary defines a scientist as a person having professional knowledge on one or more sciences, especially natural science or physical science. 1.________ Let's look at some characteristics of an excellent scientist.
Curiosity
2．________ Scientists such as Thomas Edison and George Westinghouse discovered things mainly because they wanted to know how things work. If a scientist doesn't have the drive to ask questions or even wonder, then he/she never gets to the first stage of the scientific process.
Patience
3．________ There are very few jobs that take longer than this one. Even if you think you have received some education on science, you still have a lot of scientific researches to do. If you're an instant gratification (及时满足的) type of person, this may not be the best choice for you.
Ethical (道德的) qualities
In order to truly discover and use knowledge for the greater good, a scientist must have a desire to improve people's life as well as the environment and living things, since they are all linked and they can affect one another in the long run. A scientist must report findings honestly regardless of personal or outside commercial (商业的) interests. Sticking to an old belief without evidence is dishonest. 4.________
Working habits
An excellent scientist even takes notes of the smallest observation, keeping it in mind and recording it. 5.________ He/She also needs to communicate thoughts on paper and verbally. Networking skills connect him/her with colleagues working on similar projects where he/she may discover something new.
A．Becoming a scientist takes a long time.
B．An excellent scientist must be very curious about things.
C．It also defines a scientist as someone who uses scientific methods.
D．However, that belief shouldn't be changed without powerful evidence.
E．He/She can work well alone or in groups, depending on what's needed.
F．To make discoveries in human knowledge, you have to think differently.
G．One of the main places that many scientists work in is the research laboratory.
【解题导语】 文章介绍了成功的科学家的性格特点。
Ⅲ.语法填空
Rome wasn't built in a day. Nearly two decades have passed since China launched the first Beidou satellite in 2000. Since then, more Beidou satellites have been sent into orbit, 1. ____________(form) the Beidou Navigation Satellite System (BDS)．
In late 2012, BDS 2.____________(begin) providing services to people in China and other parts of the Asia Pacific region. At the end of 2018, it started to provide global services. Now with two more Beidou satellites 3.____________(launch) on Dec.16, 2019, BDS has 53 satellites in orbit. It 4. ____________(expect) to greatly improve the system's ability to serve 5. ____________(user) worldwide.
Although a satellite based navigation system needs only 24 satellites to run 6.____________(proper), having 53 allows for better coverage.
This is 7.____________ it works: a signal receiver on Earth measures its distance from at least three satellites by recording the amount of time it takes 8. ____________(receive) their signals. Then it can calculate its location. With so many satellites, BDS can provide 9. ____________more accurate calculation. While GPS provides meter level positioning accuracy, BDS reduces the error 10.____________ centimeters. This service is especially useful for land surveying, mapping, agriculture and automated driving.
Future plans call for a smarter and more accessible system with Beidou at its core, to come online by 2035. By then, we can probably say that Rome has finally been built.
【解题导语】 本文是一篇说明文。文章介绍了我国自主研发的北斗定位系统， 包括其发展、作用、运行模式、优势等。
参考答案
[层级一 小题夯基练]
维度一 品句填词
1．passive.
2．accurate.
3． significant.
4．cures.
5．mental.
6．extraordinary
7．chemist.
8．origin.
9．species.
10． theory.
维度二 词形转换和动词的形式变换(用所给词的正确形式填空)
1．_significance
2．originally.
3． be__cured.
4． injured.
5． mentally.
维度三 单句语法填空
1． have____taken have__been__set.
2． has__been__finished.
3． have__been__built.
4． have__been__collected.
5．was__offered.
6．has__been__invited.
维度四 完成句子
1．what__has__been__marked．
2． has__been__used.
3．have__been__produced.
4． has__been__finished.
5． have__been__used．
维度五 书法与写作
提醒：①每个字母圆润饱满，压线书写；②宜用0.5或0.7 mm中性笔。
[层级二 语篇提能练]
Ⅰ.阅读理解
A
1．
D 解析：推理判断题。根据第一段中的have no electricity or running water和第二段中的“William thought he could build a windmill for his family”可知，威廉造风车的初衷是给家里发电。
2．
C 解析：观点态度题。根据第三段中的“a lot of people laughed at him, including his mother”可知，一开始他的妈妈也不相信威廉能造出风车。
3．
B 解析：细节理解题。根据第三段中的“He didn't have the parts and equipment that he saw in the book's pictures. So he looked for parts in junkyards to build his machine.”可知，威廉的第一个风车是由废弃的东西做的。
4．
D 解析：推理判断题。在威廉开始造风车时，很多人嘲笑他，但他仍然充满信心，并鼓励人们不要放弃梦想。由此可知，威廉是一个意志坚定的人。
B
5．
D 解析：细节理解题。根据第一段中的“Most interestingly, it uses artificial intelligence to take photography out of your hands and captures moments entirely on its own！”可知，谷歌开发的这款相机使用人工智能来拍照，不需要你手动按键，它就可以帮助你记录美好的精彩瞬间。故选D。
6．
B 解析：词义猜测题。根据第二段中的“like when a child does something cute that may happen too quickly for you to pull out your smartphone”可知，画线词所在句表示这款相机能解决手机不能及时抓拍小孩子所做的短暂又可爱的事的问题。candid moments意为“短暂的时刻”。故选B。
7．
A 解析：细节理解题。根据最后一段可知，这款相机依靠先进的科技和人工智能等使得它成了可以帮助人们记录美好瞬间的工具。故选A。
8．
C 解析：主旨大意题。通读全文尤其是第一段中的“Google's new camera, called Clips, is a smart device.”可知，谷歌开发了一款新的照相机，文章对照相机的各种功能和使用进行了介绍。故选C。
Ⅱ.七选五
1．C 解析：空前指出，字典将科学家定义为在一门或多门科学方面有专业知识的人，尤其是自然科学或物理科学。由此可知，此处讲的是对科学家这一名词的理解。故选C。
2．B 解析：根据此段小标题Curiosity可知，科学家们的一个特征是有好奇心。故选B。
3．A 解析：根据此段小标题Patience以及下文可知，成为科学家需要很长一段时间。故选A。
4．D 解析：空前一句提到，坚持一个没有证据支撑的陈旧观念是不诚实的。D项是对前一句的补充说明。故选D。
5．E 解析：根据此段小标题Working habits可知，本段谈论的是工作习惯。空前提到他们会记笔记，空后提到他们需要把他们的想法在纸上写出来或口头表达出来。E项指出，他们可以根据需要独立工作或团队合作，承接上文，引出下文。故选E。
Ⅲ.语法填空
1．forming 解析：考查非谓语动词。分析句子结构可知， 句中已有谓语动词have been sent，无连词，可推断空处应为非谓语动词， 在句中充当状语；空处与逻辑主语Beidou satellites之间是主动关系， 所以要用现在分词。故填forming。
2．began 解析：考查动词的时态。分析句子结构可知， 句中缺少谓语动词， 可推断空处充当谓语；根据时间状语In late 2012可知， 应该用一般过去时。故填began。
3．launched 解析：考查with的复合结构。分析句子结构可知，此处是“with＋宾语＋宾补”结构，空处与逻辑主语two more Beidou satellites之间是被动关系， 所以要用过去分词。故填launched。
4．is expected 解析：考查动词的时态和语态。分析句子结构可知， 句子缺少谓语动词， 可推断空处充当谓语；结合文章时态可知， 应该用一般现在时；主语It指的是BDS，与expect之间是被动关系， 所以要用一般现在时的被动语态。故填is expected。
5．users 解析：考查名词的复数。空处位于不定式to serve后面， 充当宾语， 且此处指的是全世界的用户，应该用复数形式， 泛指多个用户。故填users。
6．properly 解析：考查副词。空处位于非谓语动词to run后面， 起修饰作用， 修饰动词要用副词形式。故填properly。
7．how 解析：考查表语从句关系词。句意：这是它如何运作的(模式)。分析句子结构可知，句中有系动词is和谓语动词works，所以空处需要填入关系词；从句位于is后面，是表语从句；根据后文的描述可知，这里说明的是运行模式，所以要用关系副词how。
8．to receive 解析：考查固定句型。分析句子结构可知，句中含有省略关系词that/which的定语从句“it takes____________(receive) their signals”，修饰先行词time；此处考查固定句型it takes time to do sth.，意为“做某事花费多少时间”。故填to receive。
9．a 解析：考查冠词。句意：因为有这么多的卫星，北斗卫星导航系统可以提供一种更精确的计算结果。calculation在句中意为“计算结果”，是可数名词，前面没有限定词，不是特指，需要填不定冠词；more的发音以辅音音素开头。故填a。
10．to 解析：考查介词。句意：全球定位系统提供到米的定位精确度，而北斗卫星导航系统把误差减少到了厘米。根据句意可知，此处考查固定表达reduce to...意为“减少到……”。故填to。
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