[题目]现在大多数青少年的运动量都不如过去多.Most teenagers 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】现在大多数青少年的运动量都不如过去多。

Most teenagers______________________________________________________

【答案】don't get the same amount of exercise today as they did in the past.

【解析】

通过中英文句子对照可知，英文句子中缺少“运动量都不如过去多”的表达。thesameas是固定搭配，和……一样,其否定式直接在其前加not；get the same amount of exercise保持相同的运动量，get为实意动词，主语是复数，这里表示的是否定形式，需要借助于助动词do，与not缩写为don’t；as后面接比较状语从句，主语是they，与过去相比较，所以用助动词did；in the past在过去；故答案为don't get the same amount of exercise today as they did in the past.

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①In Japan, we are supposed to kiss when we see each other.

②In Switzerland, we never visit a friend without calling first.

③In India, we can eat with our hands.

④In Mexico, we should bow when meeting for the first time

⑤In Colombia, it's OK if we arrive a bit late when we are invited to have dinner in a friend's house.

A.②③⑤B.②③④C.①④⑤

【题目】Bacterial Quorum Sensing

Bacteria(细菌)play an important role in our lives. They can keep us alive as well as make us sick. It wasn’t until fairly recently that we learned bacteria can communicate with one another.

In the 1960s, researchers found that a kind of bacteria called Vibrio fischeri（费氏弧菌） produced no light when they were alone, but that they exhibited great amount of light as the bacterial population grew to a certain number. How did this happen? How can Vibrio fischeri tell the difference between times when they’re alone and times when they’re in a community, and then all do something together?

Researchers found they talk to each other with a chemical language—signal molecules(信号分子). Vibrio fischeri makes signal molecules, and it also has a receptor on its surface that fits like a lock and key with a signal molecule. As the bacteria increase, more and more signal molecules are sent into the environment. When signal molecules increase to a certain amount, they lock down into those receptors and information comes into the bacteria, which tells them how many neighbors there are. As soon as they realize the population has hit the certain number, all of the bacteria behave as a group, making light together. In the past ten years, researchers have found all bacteria have systems like this: they make and recognize chemical words, determine(判断)the size of the community, and carry out tasks that would be unsuccessful if a single one were to act alone. This process is called quorum sensing.

Most of the time, bacteria live with thousands of other species (种类)of bacteria. There has to be a language of interspecies communication. In fact, bacteria have another kind of signal molecule, which is the common language used by all species. Moreover, this kind of molecule has its own receptor. In this way, bacteria are able to count different populations, and then they decide what task to carry out depending on which species has the greatest population.

Knowing how bacteria communicate could influence how we fight disease. What if bacteria can’t talk or hear? They won’t recognize when there are enough bacteria and when to exhibit the group behavior to make us sick. Researchers are developing a method—to make molecules that look like the real ones and then they lock into the receptors to jam recognition of the real situation.

On the other hand, researchers also improve the conversation of the beneficial bacteria, so they can do things that we want them to do better than they would do on their own.

【1】According to the passage, what can we learn about quorum sensing?

A.Quorum sensing may happen when there is only one Vibrio fischeri.

B.Signal molecules are kept away from receptors during quorum sensing.

C.Most bacteria have similar systems to make light during quorum sensing.

D.Bacteria carry out a group task when their population hit a certain number.

【2】What can we learn from the passage?

A.The more species there are, the more group actions bacteria will take.

B.In different environments, bacteria have different interspecies languages.

C.Beneficial bacteria communicate better by themselves than harmful ones.

D.To fight disease, researchers try to turn off the communication between harmful bacteria.

【3】The passage is mainly about ________.

A.why bacterial population growsB.how bacteria communicate with each other

C.which bacteria help fight diseaseD.what scientists do to find quorum sensing

【题目】—Would you please give me a speech on Chinese traditional festivals tomorrow?

—_________, but I'm going to Guangzhou for a meeting.

A.It doesn't matter.B.Best wishes.C.Not at all.D.I wish I could.

【题目】 How far can scientists let their curiosity go? The Ig Nobel Prize, a spoof (滑稽模仿) of the prestigious (权威的) Nobel Prize, exists to award unusual or unimportant achievements in scientific research.

The awards are given every year to the 10 strangest research projects of the year. It is to "honor achievements that first make people laugh, and then make them think"

On September 12, the 2019 winners of the Ig Nobel Prize were announced. Here are three of them.

Medicine Prize: Pizza

It's one of the world's most popular foods. but what if we told you that a pizza can protect you against illness and death? According to the Ig Nobel Medicine Prize winner, eating more pizzas can lower the risk of cancer and heart disease---if your pizza is filled with fruits and veggies. These provide flavonoids (类黄酮) to fight against certain diseases. So, if you're a pizza enthusiast, you now have one more reason to love it!

Economics Prize: Dirty Money

As one of the most frequently passed items on the planet, paper money is known to pick up all kinks of bacteria (细菌). Which country's money is the dirtiest? To find the answer, an international team of scientist compared seven countries' paper money. They found that the notes including more polymer (聚合物) specifically the Romanian Leu carry more drug-resistant pathogens (病原体). Perhaps this will make cashless payments popular.

Biology Prize: Cockroach(蟑螂)

Cockroaches are well known for their survival abilities, but few people know they can sense magnetic (磁性的) fields. More surprisingly, an international team found that dead cockroaches have more magnetic properties (特性) than live ones. That's because magnetic properties drop when the temperature gets higher.

So if you can stand cockroaches, they may be good magnetic sensors.

【1】According to the survey, which country's paper money is the dirtiest?

A.RomanB. LebanonC. RussianD.Romanian

【2】What kind of cockroach may have more magnetic properties?

A.A dead one near the stove.B.A live one near the stove.

C.A dead one near the fridge.D.A live one on the ground.

【3】Which of the following statements is True according to the passage?

A.The Ig Nobel Prize is a kind of prestigious Nobel Prize.

B.If a person has cancer and heart disease, he shouldn't eat too many pizzas.

C.Because paper money is useless, this makes cashless payments more popular.

D.Because cockroaches have magnetic properties, people may apply this feature to sensors.

【题目】 The next time you look up at the sky and see a cloud that looks like Mickey Mouse or your favorite fruit, look again. It may not be a cloud, but a Flogo — a 1ogo (标语) that flies. It's a new form of advertising(广告) in the sky that's never been used before. It's a different way to market your products, logos, and events.

These funny logos are made with soap bubbles (肥皂泡) mixed with a little helium gas (氦气) , which makes them lighter than air and float in the sky. Special machines are used to make these new funny Flogos. The machine, which can be rented for $ 2,500 a day, can make a Flogo every 15—25 seconds.

Flogos can fly much higher or lower if needed. They can last from a few minutes to an hour anywhere in the sky, depending on the weather conditions. Though they can fly to 20,000 feet, they usually float around at 300—500 feet. Flogos are only white now, but people hope to have more colorful Flogos in the near future.

Flogos are Green, 100% environmentally safe, because the soap used to make the Flogo comes from plants and leaves. So this fun way of advertising is healthy and good for the environment.

【1】Flogos are mainly used to________.

A.produce colorful cloudsB.advertise in the sky

C.make attractive bubblesD.tell weather conditions

【2】Why are Flogos healthy and good for the environment?

A.Because they can float high and last for a long time in the sky,

B.Because there is a little helium gas mixed with soap bubbles.

C.Because people use special and expensive machines to 'make Flogos.

D.Because people use plants and leaves to produce the soap bubbles.

【3】From the passage, we can infer that Flogos________.

A.can fly for hours in the sky all dayB.can have different colors at present

C.may be influenced by the weatherD.may be the cheapest way of advertising

【4】Which of the following can be the best title of the passage?

A.Machines—Used for Flogosl!B.Flogos 一 Logos that fly!

C.Advertising—Made of Fruits!D.Clouds 一 Like Mickey Mouse!

【题目】 Everyone needs friends. There is an old saying, “Friends are God’s way of _______care of us.” But how do you find real friendship and keep it? I think finding friendship is just like planting a tree. You plant the seed and look after it to _______it grow. First, you should choose a friend. What makes a good friend? A good friend doesn’t need to have much money or good looks, but he should be _______ and helpful. For example, if you have a bad day, a good friend should come to stay with you and make you _______. But things can not always be so pleasant. Even the best friends can have _______. What should you do when you have fights with your friends? You may talk to them or just write a letter to say _______ to them. Let me tell you three ways to be friends again. First, let him or her know _______you are feeling. Then you can tell your friend he or she is wrong. Third, tell him or her the ______ why you did this or that. If you don’t have a friend before, you had better think of having_______ . As you know, friendship is the most_______ thing in your life and life will be greater if you have friends.

【1】A.takeB.tookC.takenD.taking

【2】A.bringB.takeC.makeD.do

【3】A.cleverB.kindC.smartD.strong

【4】A.happyB.unhappyC.sadD.bad

【5】A.needsB.questionsC.problemsD.plans

【6】A.sorryB.helloC.thanksD.goodbye

【7】A.whatB.howC.whyD.that

【8】A.factB.questionC.wayD.reason

【9】A.theseB.oneC.thisD.that

【10】A.boringB.seriousC.funnyD.necessary

【题目】 Infrared thermometers（红外温度计）, or temperature guns, have been widely used to detect（检测）the early symptoms of COVID-19. They allow us to measure（测量）temperatures quickly. How do these thermometers work?

They determine temperature by measuring the energy coming from your skin （皮肤）. Everything in nature has molecules （分子） inside of it that are always moving around. This include our skin. The higher the temperature is, the faster the molecules move. The molecules give off infrared light while moving.

This kind of light can be focused or absorbed（吸收）. The thermometers use a lens（镜头）to focus infrared light from the skin onto a detector called a thermopile（热电堆）. The thermopile absorbs the infrared radiation and turns it into heat. The electronic sensors inside the thermometers can measure the heat and read the temperature of the skin after making some calculations （计算）.

However, you might sometimes find that the results aren’t always accurate （准确的）. It depend on how these devices are used. For example, how far away they are held from the body, how steadily they are held and for how long. Factors such as make-up and sweat will also affect the results.

【1】Temperature guns, have been widely used to detect （检测）the early symptoms of____________.

A.COVID-17.B.COVID-18.C.COVID-19.D.COVID-20.

【2】They determine temperature by measuring the energy coming from your____________.

A.skinB.headC.faceD.foot

【3】The electronic sensors inside the thermometers can measure the heat and read the____________ of the skin.

A.colorB.temperatureC.lightD.structure

【4】Which one of the following might not affect the accurate results?

A.The thermometers is too far from the body.

B.The thermometers is held for very long.

C.Make-up and sweat.

D.The thermometer is held steadily at the right time.

【题目】根据短文内容及首字母提示，补全空格内单词，使短文完整、通顺。

Camilla Chomp was a strange little girl. She h【1】 had any friends because she thought it was much more fun to spend her time a【2】 eating chocolate.

Camilla left the house to look for some chocolate. She found a small house f【3】 with glasses. Among all the glasses, a blue glass c【4】 Camilla’s attention. It was full of chocolate. There was also a card in it, saying “C【5】 tears into chocolate.”

Camilla was very excited. She ran out of the house to look for someone crying.

First, she met a little boy crying hard, and c【6】 his tears. The tears were quickly changed into chocolate. While Camilla was collecting the tears, she comforted the boy. Finally, the boy stopped crying and they had a fun time together.

Later, Camilla met a woman who had broken some plates and an old man who c【7】 find his dog. Camilla collected their tears and made them happy again.

Soon, Camilla r【8】 that making people happy was even more important than f【9】 chocolate. So she stopped collecting tears and began to help sad people. At last, she made friends with them and had a much h【10】 life than before.

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