Many objects in the universe are invisible，but they send radio waves．The radio telescope thus appeared，and it is considered one of the greatest inventions in the twentieth century．Reber built the world's first radio telescope in 1937．Ryle and Hewish developed radio telescope systems for the location of weak radio sources，and they shared the Nobel Prize for Physics in 1974．
A radio telescope is usually made up of：One or more antennas to collect the radio waves．Most antennas are made in the shape of a dish to collect and reflect，the radio waves to the sub-reflector（副反射器），in the same way as a curved mirror focuses visible light to one point．
A receiver and amplifier to receive the radio waves from the sub-reflector，and make these weak radio waves strong enough to be recorded and turned into electronic signals．To make an amplifier sensitive enough，it is usually cooled to，very low temperatures （e．g．as low as -270℃）．
A recorder to keep a record of the electronic signals．Most ：radio telescopes today keep the signals to the computer's memory disk for astronomers to analyze later．
Radio wavelengths are much longer than those of visible light，and the radio waves from deep space are always weak．To catch Radio wavelengths are much longer than those of visible light，and the radio waves from deep space are always weak．To catch these waves，radio telescopes usually have huge antennas．The sizes of most antennas in use today are around 50 to 300 metres in diameter．The antenna of FAST in Guizhou，China，the latest and largest radio telescope in the world，is 500 metres in diameter，as large as the size of 30 football fields．
To avoid interferences，and keep the telescopes sensitive，radio telescopes are built in places where there are no human radio waves or electronic signals．For example，FAST is 5 kilometres away from the closest village and 25 kilometres away from the nearest town．
Radio telescopes create pictures of the sky，not in visible light，but in radio waves．This is extremely useful，because there are objects that can't be seen，objects that we wouldn't even know without radio telescopes．
（1）Who won the Nobel Prize for Physics in 1974？ DD
A．Reber
B．Ryle
C．Hewish
D．Reber Ryle and Hewish
（2）Radio telescopes help collect CC from the universe
A．light
B．objects
C．radio waves
D．visible signals
（3）Most antennas of radio telescopes are made in the shape of a dish to DD．
A．make the antennas strong enough
B．increase the number of radio waves
C．turn radio waves into electronic signals
D．focus radio waves on the sub-reflector
（4）The underlined word "interferences" in the passage refers to DD．
A．the noises made by villagers and animals
B．the sounds from the radios and televisions
C．the people who go to Guizhou to watch FAST work
D．the radio waves and electronic signals from humans
（5）What have we done with the help of radio telescopes？ CC
A．We have received pictures of deep space．
B．We have discovered unknown lives in the universe．
C．We have found some unknown objects in the universe．
D．We have turned the radio waves from space into light．
【答案】D；C；D；D；C
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发布：2024/4/20 14:35:0组卷：21引用：1难度：0.4
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1．It's good to share，right？Growing up as kids we are told to share our toys and not be selfish.We also live in an age where discussing our feelings is encouraged.But when does it all become too much？With new fashion trending all the time，such as dance challenges and wearing a pillow as a dress，the question is：when can sharing become oversharing on social media？
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However，Dr.Hand's research also seems to suggest that the more we post on a platform，the more socially attractive we become- if the posts are positive.Even back in 2015，Gwendolyn Seidman PhD，said that we should avoid complaining and being negative online.We should also control clear of showing off or bragging"，as it's now known--especially about our love lives.It makes sense- if your date is going "that well"，would you really have time to share a photo with text？
So，how can you know if you are oversharing？Well，why not ask your friends in real life.They would probably be more than happy to tell you if your posts about your breakfast or your gripes about your lack of money really are too much.
（1）The phrases "dance challenges" and "wearing a pillow as a dress" in paragraph 1 are used to prove.
A．a dislike of oversharing
B．an enthusiastic interest in oversharing
C．social media becoming free
D．oversharing being forbidden
（2）According to Carolyn Cole，why do people overshare？
A．Need to connect with people.
B．Curiosity to know others.
C．Desire to help others.
D．Ambition to succeed.
（3）What can be inferred about oversharing from paragraph 3？
A．Sadfishing is generally considered as positive.
B．We might be in danger when bad things happen.
C．People don't feel sorry as much when things are wrong.
D．Become more socially attractive no matter what happens.
（4）What is Gwendolyn Seidman's attitude towards showing off？
A．Negative.
B．Neutral.
C．Positive.
D．Indifferent.发布：2025/1/5 10:0:6组卷：1引用：1难度：0.2 -
2．How do you feel about nature？After spending hours indoors，do you feel better when you visit your local park？I believe the answer must be "YES".
Most people think that nature is good for our bodies and brains.However，humans are spending more time inside and less time outside.For example，the number of visitors to Canada s national parks is getting smaller every year.And in countries such as the USA，only 10% of teenagers spend time outside every day.Many doctors feel that this is a problem in the twenty-first century.
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Because of studies like these，some countries and cities want people to enjoy nature in their everyday life.In Dubai，people plan to build a new shopping mall with a large garden，so shoppers can relax outside with trees，plants and water.And South Korea has new forests near its cities and around 13 million people visit these forests every year.Getting close to nature has been thought to be necessary for brain development in children.In Switzerland， "forest schools" are popular.School children study their subjects in the forests and exercise a lot outside.So after building cities for so long，perhaps it's now time to start rebuilding nature.
In a word，nature holds a special kind of energy：it is clean，wild and spirit- renewing.jye.ai makes us grow stronger.
（1）What is the purpose of Paragraph 2？
A．To raise the problem of people's lifestyle.
B．To offer some advice for people's lives.
C．To share people's ideas about nature.
D．To show people's lives in different countries.
（2）What do the results of the studies in Paragraph 3 mainly show？
A．More healthier Canadians live close to parks.
B．The math test is difficult and makes people nervous.
C．Nature can relax people and influence them positively.
D．People's heart rates increase in a 3 D virtual-reality room.
（3）To help people enjoy nature，countries do the following except.
A．rebuilding nature near cities
B．having classes and doing sports in nature
C．planning a green area for shoppers
D．starting a brain development programme
（4）Which of the following sentences can be best put in the blank？
A．So why not run away from the cities？
B．So nature is our best choice，isn't it？
C．So why not let nature be part of our daily life？
D．So nature is more important than cities，isn't it？发布：2025/1/5 10:0:6组卷：5引用：1难度：0.1 -
3．We like to believe that before we make a decision，most of the time，we take time to consider all the facts carefully.However，experts believe that only 5% of our decisions are based on a rational thought process.So，what influences our decision- making process？
We often leave decision-making to our instincts".Scientists have found out that if we had the choice，we like to avoid pain rather than get somethjye.aig.In fact，we're twice as happy when we try to avoid a bad situation than when we experience a good one.This is why when companies send ads，they use phrases like "How to avoid ..."，"Don't miss out!"，etc.
There are also physical reasons that affect our decision- making.Psychologist John Bargh carried on an experiment where people were asked what they thought of a fictional person，while holding a cold or a hot cup of coffee.Those holding the hot cup believed the person to be warmer and more sociable than those holding the cold cup.So，when temperatures rise，the more likely we are to believe in strangers.
Stress is another thing which affects our decisions.Different situations are more or less stressful for different people.Researchers have found，though，that women are more conservative about decisions when stressed，while men are to make riskier choices.
It may come as a surprise but every day from the minute we get up，we have to make countless decisions，like what to wear，what coffee to have and so on.Each choice makes our brain a little bit more tired，and this affects our decision- making.That's why important people，like presidents wearing the same three suits all the time，want to limit the small choices and spend more brain power on the bigger ones.
（1）Which of the following shows the structure of the passage？
A.
B.
C.
D.
（2）What is the main idea of the last paragraph？
A．Every day we have to make lots of big decisions.
B．People sometimes judge a person by what he wears.
C．What people wear influences their decision making.
D．Making fewer decisions helps to save brain power.
（3）What can we learn from the passage？
A．We make most of the decisions after our careful thinking.
B．People are likely to be happier to avoid something bad.
C．As the temperature is low，we are likely to believe others.
D．People usually have risky decisions under heavy pressure.
（4）The purpose of the passage is to.
A．tell us what influences decision making
B．advise people to make rational decisions
C．warn people not to make risky decisions
D．show disadvantages of rational decisions发布：2025/1/5 10:0:6组卷：15引用：2难度：0.2
