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In order to prevent the spread of COVID-19. the Ministry of Education has decided to put off the start of the spring term for schools. To make sure that students could keep studying, most schools began to offer online courses for them at home. However, you may met all kinds of difficulties while taking online classes for the first time. I hope you can get some ideas from the following examples of four students who tried to improve their online studies.
Ensure a good connection
Zhao Yuchen, 13, Beijing
For me, the biggest headache about studying online is the poor quality of my Internet connection. This almost made me mad. During one of my online classes, I couldn't hear my English teacher's voice and I had to reconnect. It wasted lots of time. Since then, I checked my network before class every day, and I asked my family members not to use the Internet while I was having a class.
Plan your time properly
Lin Xiyu, 14, Shanghai
I had a hard time planning my course timetable at first. Planning ahead with a study calendar is very important for effective (有效的) online learning. Creating a study calendar will help you remember important dates like online exams or deadlines (最后期限) for your tasks. Making a to-do list is also useful. These are all good ways to help us learn better online.
No distractions (分心)
Zhang Penghui, 5, Heilongjiang
Online learning needs strong self-control and willpower (意志力). There are lots of distractions while studying at home.
My mom likes to offer me snacks and drinks, which sometimes distracts me from listening during my classes. I have asked her to stop entering my room while I'm studying. A quiet room and a clean desk can help me concentrate (聚精会神).
Focus on your studies
Wang Ruixue, 14, Hebei
The Internet is new to us children in the countryside. Many online games are very attractive to me, and they may take a lot of time away. I have used a timer (计时器) to record time spent on non-course websites and limit myself to five minutes at a time. When you feel yourself losing concentration, consider taking a short break, but make sure that the time you spend on your breaks won't take too much of your study.
1.________ almost drove Zhao Yuchen crazy while studying online.
A.The low voice of his English teacher
B.The poor quality of his Internet connection
C.Too much noise from his family members
D.Planning the course timetable reasonably
2.According to Lin Xiyu, ________ is the key to effective online learning.
A.regular reviewing B.careful note-taking
C.proper time planning D.high quality of Internet connection
3.Zhang Penghui's mother is not allowed to enter his room because he wanted to ________.
A.play games secretly
B.focus on his lessons
C.enjoy his favourite snacks and drinks alone
D.ask her mother to cook for him
4.According to the passage, we can learn that Wang Ruixue ________.
A.thinks it's necessary to have s short break
B.spends too much time on online games
C.doesn't know how to control her time on breaks
D.thinks the Internet is useless for the countryside students
5.The passage is written mainly to ________.
A.explain how important online studying is
B.complain the problems of online studying
C.encourage to improve our English
D.show us how to improve our online studying
难度: 困难查看答案及解析
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Have you ever had dreams about building a robot? Or putting together a spaceship? Or even seeing your face made out of chocolate? Done. All you need is a 3-D printer!
The possibilities of 3-D printing seem endless. All the user has to do is to design(设计) an object on the computer and choose a material(材料) to print in. The printers print in hundreds of different materials including glass, sugar and even skin! When the user presses “print”, the 3-D printer spreads the material layer(层) by layer and like magic the object is produced.
The first 3-D printer was invented in 1986 by an American, Charles Hull. But 3-D printing has only become cheap enough recently for most people to use. Designers now use 3-D printing to create unusual things. The Dutch artist Dirk Vander Kooj prints furniture made from old fridges. And doctors have used 3-D printing to print human body parts! The Telegraph reported in February that scientists from Cornell Medical College even printed a man-made ear.
But like a lot of new technologies, if 3-D printing gets into the wrong hands, it can be dangerous. In 2011 a group of four men in the US used 3-D printing to produce ATM skimmers (提款机盗刷器). These were placed on an ATM and stole over $400,000 from users of the ATM. It is terrible to think thatcriminalslike them might one day use a 3-D printer to print a gun.
But for better or for worse, 3-D printing has been put into use. In a few years, you’ll probably be wondering how you could ever live without your 3-D printer!
1._______ invented the first 3-D printer.
A.Charles Hull B.Dirk Vander Kooj
C.A doctor called Cornell D.Four men in the U.S
2.What is the correct order for people to use a 3-D printer?
a. Choose a proper material.
b. Press the print button.
c. The 3-D printer spreads the material.
d. Use a computer to design an object.
A.a-b-c-d B.d-a-b-c
C.a-c-d-b D.d-c-b-a
3.The underlined word “criminals” in the fourth paragraph might mean ______________ in Chinese.
A.技术员 B.军人 C.罪犯 D.用户
4.According to the passage, people have NOT yet produced _________ with a 3-D printer.
A.some furniture B.a man-made ear
C.ATM skimmers D.a gun
5.What does the writer think of the 3-D printer?
A.It is necessary only for our work.
B.It is helpful but dangerous.
C.It is too expensive for most people.
D.It is useless in our daily life.
难度: 困难查看答案及解析
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Has anyone ever told you that eating carrots will help you see in the dark?
This is just one of many incorrect beliefs you may have heard. Below, we have picked out scientific explanations for three mistakes that people make about their eyes. Let's take a look.
Can eating carrots improve your eyesight?
Carrots are rich in vitamin A, which helps the eyes to turn light into information for your brain. This allows people to see in darker places.
However, eating more carrots won't help you see better. A certain minimum amount will help, but a large number of carrots will not give you superhuman vision.
If your parents have bad eyesight, will you have bad eyesight, too?
Myopia(近视)can be passed from parents to children.
A study by the American Optometric Association found that if both parents are myopic, there's a 33 to 60 percent chance that their child will be. For children who have one parent with myopia, the chance is 23 to 40 percent. and it's down to 6 to 15 percent for kids with non-myopic parents.
So if your eyesight is bad, your children might still have good vision.
Do color blind people see the world in black and white?
Color blindness doesn't usually mean that people see the world like an old movie. They usually can't tell certain colors apart, especially green and red. Another commonly confused pair of colors is yellow and blue.
Our eyes have cone cells (视锥细胞) that sense different wavelengths (波长) of light. If these cells don't work properly, color blindness occurs.
There are different levels of color blindness. Some people are only color blind in low light.
However, in the most serious form of color blindness, everything is shades of gray.
1.According to the article, eating carrots ________.
A.stops the brain from seeing
B.doesn't help you see better at all
C.will help you see clearly in the dark
D.is good for your eyes to some degree
2.If both parents have myopia, their child's chance of having good eyesight is ________.
A.40-67% B.33-60% C.23-40% D.6-15%
3.What is the cause of color blindness, according to the text?
A.Watching movies for too long.
B.Getting too little exercise.
C.Cone cells not working properly.
D.Changes in the wavelength of light.
4.Which statement is RIGHT?
A.You can have superhuman vision after eating a large number of carrots.
B.If your parents have bad eyesight. You might still have good vision.
C.Color blind people see the world in black and white.
D.It's unnecessary to protect our eyes.
5.What is the purpose of the article?
A.To offer some advice on protecting your eyes.
B.To clear up some misunderstandings about our eyes.
C.To provide help for improving your vision.
D.To explain how bad eyesight and color blindness form.
难度: 中等查看答案及解析