It doesn't take decades of life experience to have a great idea, as many of these young inventors have proved.
The Electronic Television
The electronic television was first designed by a 14-year-old kid in 1920. Philo Taylor Farnsworth shared his concept of an image transmitting (影像传送) device, an early design of the electronic television, with his science teacher, drawing diagrams on several blackboards in class.
By the age of 21 Farnsworth had a working model which served as a basis to all later development and versions of electronic televisions, After discovering a collection of technology magazines in the attic (阁楼) of his family's new home, he developed a passion and interest in electronics, which led him to explore inventions in the field of, specifically, the image transmission.
In 1927, a few years out of high school, Farnsworth was the first inventor to transmit a television image of a dollar sign, composed of 60 horizontal lines.
Braille Language
Louis Braille suffered a serious eye injury when he was just 3 years old. Not only did the accident cause him blindness on that side, but the infection spread and blinded the other eye as well. After more than a decade of struggling with the slow system of tracing his finger over raised letters, Braille was 12 when he learned of a method of silent communication originally created for the French military. He simplified it, and in 1824 the Braille language was born.
Popsicles (冰棍)
A lot of kids are easily distracted (分散注意力)—and thanks to the short attention span of 11-year-old Frank Epperson we now have popsicles. In 1905, Epperson, a San Francisco native, was stirring powdered drink mix into a cup of water when something else caught his attention. The mixture was forgotten outside the door, and when Epperson rediscovered the drink in the morning, it was a deliciously portable frozen popsicle. After years of making the frozen treats for friends, and eventually his own. children, Epperson filed for a patent in 1924.
1.Who contributed his intelligence to the invention of TV?
A.Philo Taylor Farnsworth
B.Farnsworth's science teacher.
C.Louis Braille.
D.Epperson.
2.Which invention was accidentally made because of poor concentration?
A.The Electronic Television.
B.The Braille Language.
C.Dollar Sign.
D.Popsicles.
3.What do the three inventions have in common?
A.They were all designed for the sake of kids.
B.They were all made by young boys.
C.They were all made in the 20th century.
D.They were all created within a few years.
难度: 中等查看答案及解析
It was unusually quiet in the emergency room on December 25. I didn't think there would be any patients, sighing about having to work on Christmas. Just then five bodies showed up at my desk, a pale woman and four small children.
“Are you all sick?” I asked doubtfully.
“Yes,” she said weakly and lowered her head.
But when it came to descriptions of their presenting problems，things got a little vague. Two of the children had headaches，but the headaches weren't accompanied by the normal body language of holding the head or trying to keep it still. Two children had earaches， but only one could tell me which ear was affected. The mother complained of a cough but seemed to work to produce it.
Something was wrong，but I didn't say anything but explained that it might be a little while before a doctor saw her. She responded，Take your time; it's warm in here.”
On a hunch (直觉)，I checked the chart after the admitting clerk had finished registering the family. No address— they were homeless. The waiting room was warm.
I looked out at the family huddled by the Christmas tree. The littlest one was pointing at the television and saying something loudly and excitedly to her mother. The oldest one was looking at an ornament on the Christmas tree.
I went back to the nurses' station and mentioned we had a homeless family in the waiting room. The nurses, complaining about working Christmas, turned to compassion for a family just trying to get warm on Christmas. The team went into action，much as we do when there's a medical emergency. But this one was a Christmas emergency.
We were all offered a free meal in the hospital cafeteria on Christmas Day，so we claimed that meal and prepared a banquet for our Christmas guests. As seriously as we met the physical needs of the patients that came to us that day， our team worked to meet the needs, and exceed the expectations, of a family who just wanted to be warm on Christmas Day. Later，as the family walked to the door to leave, the four year -old came running back, gave me a hug and whispered, "Thanks for being our angels today.”
1.What did the author learn from the family s descriptions of presenting problems?
A.Two of the children had headaches.
B.One of the children had earaches.
C.The mother pretended to be coughing.
D.The whole family were seriously ill.
2.The author made sure that the family were homeless by ______.
A.asking them some questions
B.listening to their introduction
C.observing their facial expressions
D.checking their registration information
3.After knowing about the homeless family， the nurses ______.
A.gave them a medical treatment
B.provided them with a big dinner
C.prepared a Christmas tree for them
D.held a big Christmas party for them
4.What can be the best title for the text?
A.An Unusual Christmas Emergency
B.Warm hearted and Beautiful Nurse Angels
C.Having Christmas Together With a Poor Family
D.Receiving Special Christmas Guests in the Waiting Room
难度: 简单查看答案及解析
If you're one of the millions of Americans now trapped in home because of the COVID-19，it might feel like you're cooking more than you've ever cooked in your entire life. And maybe you' re planning to reduce your home food wastes. A good way of dealing with them is to learn to make compost (堆肥).
Select your food wastes. Start with fruits and vegetables — the skin of a sweet potato，the top of your strawberry. Also tea bags, coffee grounds, old flowers and even eggshells are good raw materials. Store these food wastes in a container so you can add them bit by bit. The container doesn't have to be bought online. It can just be an old milk carton (纸箱) or an old wooden chest —just work with what you have available. Also, you can store the food wastes in a bag in your freezer or fridge. That's an easy way to avoid odors and insects in your kitchen.
The crucial step is to make the compost mix. In the world of composting you're inevitably going to hear about ''the greens and browns''—the two main elements for your mix. ''Greens'' are typically wet food wastes, like fruit and vegetable peelings. They are a crucial part for the growth of organisms (微生物),''Browns" are typically dry and they are more carbon rich like newspapers, dried leaves，and pine needles. A good thing to remember is when you're layering， put the dry browns on the bottom with the wet greens on the top because they allow water and air to flow. That will make sure organisms can do their job.
How long do you have to wait for the compost breakdown? If it's hot, you could get there in two months pretty easy. If it's cold, you could be there in six months, And for every component to break down, it might be a year.
In the end ''your nose knows'' when the compost is ready. It just smells so woody, earthy, sweet or sometimes sour. The smell can tell how well you work at your compost.
1.What is a good solution to your home food wastes?
A.Make a plan and reduce the wastes.
B.Collect the picked wastes to make compost.
C.Select the wastes and bury them into the earth.
D.Pick the wastes and put them in a bag in your fridge.
2.What plays a crucial role in making the compost mix?
A.Wet ''greens''
B.Dry "browns''
C.Carbon rich materials.
D.Wet ''greens'' and dry ''browns''.
3.Why should the ''browns'' be put on the bottom with the ''greens'' on the top?
A.To help the organism work on the compost efficiently.
B.To save more space for the water and air to flow.
C.To allow the water and air to flow into the container.
D.To make sure the organism can live longer and better.
4.What does the author feel about making compost?
A.Pretty easy and fun.
B.Complex and time killing.
C.Demanding patience but worthwhile.
D.Calling for hard work but enjoyable.
难度: 中等查看答案及解析
The electricity bill for an average family with 2 children is worth about 1 full salary per year, but the revolutionary EcoVolt could put 50% of that money back into your pocket.
In 2017, a revolutionary new product called EcoVolt hit the market. Initially it was separated from the general public, all because it offered the opportunity for average families to save up to 50% of their monthly energy costs. EcoVolt is a small, simple, affordable, and easy to use plug in unit that stops unnecessary power from entering the electrical cables and overloading the network, EcoVolt is the utility (公用事业) provider' s best-kept secret. They 've been trying to hide it from the everyday power consumer and even have banned the sale of it in retail shops —just to maximize their profit. However, thanks to the internet, the secret is now out, and everyday customers are now attaining the rewards of less power consumption overall, as well as less power used by household appliances. Your household appliances (家用电器) may last longer than previously. Basically, EcoVolt provides the opportunity for you to save between 30 and 50 percent on your energy bill. That's a phenomenal saving and leaves few questions as to why this has been hidden from consumers.
The benefits of EcoVolt are huge, and researchers are convinced this device could spell the end of unaffordable power bills that can cripple the average wage earner at the end of the month. Scientists initially spent many months trying to expose its efficiency, but those studies now prove that EcoVolt should be common in every household.
It's easy to connect, simply by plugging it into your wall, and it's suitable for both standard homes and apartments connected to a power grid (电网). It also has a counter which shows how you're making more efficient use of your energy, all the while allowing you to gain the rewards of a more everlasting household appliance lifecycle. In just 1-2 months, you've made your money back on your initial purchase.
1.What do we know about EcoVolt?
A.It is a new affordable website service.
B.It is a revolutionary new network product.
C.It is a new simple electricity- saving device.
D.It is a revolutionary electrical money-saving app.
2.What does the underlined word “cripple" in paragraph 4 mean?
A.Bring many benefits.
B.Bring too much burden.
C.Get rid of difficulty.
D.Get into debts.
3.How does EcoVolt benefit consumers?
A.It helps consumers save much on their electricity bill.
B.It makes it easier for consumers to use appliances.
C.It connects more families to the Internet.
D.It makes electricity use much securer.
4.We can infer from the last paragraph that EcoVolt ______.
A.is very convenient and favourable
B.is suitable for both home and public use
C.will be an everlasting household appliance
D.can help gain rewards of purchase discount
难度: 中等查看答案及解析
Most of us don't have millions of dollars to go door- to-door to persuade people to care about climate change. But most of us do have parents.1.Because if we can't convince the people who love us more than anything in the world to take action on climate， who can we convince?
It might be a hard conversation. If you do accept this challenge, here are a few suggestions 2.If you've ever used any poisonous terms, please get rid of them from your vocabulary. Otherwise, you 're making everything worse.
Share a couple of informative articles on the topic. Bill McKibben's article in Rolling Stone is great and very readable.3.The most important thing for them to understand is that on our current path we may no longer have a climate that allows for stable，secure societies within the lifetimes of today s children.
Once these unpleasant facts are laid out, making it clear that you aren't blaming them for this. Your parents likely made their decisions with a strong sense of morality and social responsibility, and could only make those decisions based on the information they had at the time.4.But now that you have provided the new information, talk about how it warns them, and all of us，to behave in new ways.
Encourage them to buy environmentally- friendly goods and services as much as possible. Talk to them about trying to avoid using non-renewable resources and make it clear that this will not be enough.5.
A.Warn them to care about the change.
B.Talk to them with love and respect.
C.There is no need to flood them with data.
D.So let's talk to them about climate change.
E.There are a lot of interesting articles about climate change in it.
F.Therefore, if they have done something improperly, it is not their fault.
G.This is a challenge that requires us all to act as citizens, not just as consumers.
难度: 中等查看答案及解析
“What is one thing that you would want to do now?” Tracy, my best friend, _______such question to me one day when we had a video chat.
"Lie in bed, eat, drink and do some reading. It would be the _______ not getting out of the house ever again!" I replied, _______.Looking back at this memory, I wish I was more_______ and happier with all those fun times I had with friends. I never thought things would go the way I _______. Due to the fast spreading COVID-19，the entire school district has been _______for the past 3 weeks. Recently, we have received _______of it being closed until next semester.
It's _______how I've always wanted to be at home and have the _______of never going out again. As soon as I had this opportunity, I was ________. Thinking that I will be ________at home for the next two months, ________I become very unwell.
Whenever I was at________，I wished to go home. Now I have to be at home and I ________school. Am I ridiculous? I guess I really am.
In the following days，I have experienced and________the panic caused by the COVID-19. I've ________realized what is the significance of life and how ________ the health is. Also I've learned that good living and studying ________ are vital to all of us. Most importantly, I figure out that the world is whole and ________and we are required to live in ________with each other.
1.A.gave B.threw C.showed D.took
2.A.easiest B.simplest C.toughest D.best
3.A.smiling B.crying C.laughing D.sighing
4.A.content B.confident C.energetic D.accurate
5.A.know B.want C.find D.imagine
6.A.cut off B.moved away C.blocked up D.shut down
7.A.news B.letters C.warning D.punishment
8.A.amazing B.difficult C.strange D.crazy
9.A.right B.option C.permit D.opinion
10.A.upset B.happy C.calm D.awkward
11.A.stuck B.left C.locked D.monitored
12.A.again B.still C.suddenly D.quickly
13.A.outside B.class C.home D.school
14.A.ignore B.miss C.choose D.quit
15.A.got B.shared C.witnessed D.understood
16.A.just B.truly C.never D.quickly
17.A.weak B.safe C.poor D.precious
18.A.habits B.skills C.plans D.problems
19.A.full B.crowded C.connected D.beautiful
20.A.nature B.harmony C.space D.hope
难度: 中等查看答案及解析
阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。
Beijing Daxing International Airport, which catches the world's attention, has already been put into operation. It 1. (shape) like a phoenix (凤凰) and it has four main runways at the new airport—three vertical and one horizontal,2.helps shorten flight times and reduce delays. It is the first time that our architects 3.(adopt) such particular pattern in airport construction history. 4.expressways, intercity rails and high-speed rails, passengers can reach Tianjin, Baoding and Tangshan in one hour. This has brought much 5.(convenient) to passengers.
China Eastern Airline Flight MU535 marked6.beginning of the China's new transport hub ( 枢纽). China Eastern Airline is one of the 15 companies currently 7.(operate) at the new airport. The airport will operate 116 routes 8.(global) around the end of this year.
The airport is working with customs to make security checks 9.(easy) and more efficient. Passengers on international flights don't need to have their carry -on luggage 10.(check) again after they go through the security gate.
难度: 中等查看答案及解析
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。
删除：把多余的词用斜线(\)划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1.每处错误及其修改均仅限一词；
2.只允许修改10处，多者(从第11处起)不计分。
A few months after return to the US from Spain, I took a French course. I could speak well Spanish, so I decided to study other language. In the first lesson, Mr. White guided us to do a lot of pronunciation exercise. He would say a word and two in French，and each of us were asked to follow him in turn. When it was my turn, he kept having me to repeat what he said. After class, I ask Mr. White why. “I find it great fun. I've never heard American speak French in a Spanish accent"， he said happily.
难度: 简单查看答案及解析
假定你是李华，由于新冠状病毒疫情，你不能如期去英国诺丁汉大学报到。请你给学校写一封邮件申请延迟报到。主要内容包括:
1、表达歉意2、阐述理由3、希望获准
注意：1、100词左右；
2、可适当增加细节以使行文连贯。
参考词汇：诺丁汉大学Nottingham University
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难度: 中等查看答案及解析