1 . The history of microbiology begins with Dutch cloth maker named Antoni van Leeuwenhoek, a man of no formal scientific education. In the late 1600s. Leeuwenhoek, inspired by the magnifying lenses（放大镜）he used to examine cloth, built some of the first-microscopes. He developed technique to improve the quality of tiny, rounded lenses, some of which could magnify an object up to 270 times. After removing some plaque from between his teeth and examining it under a lens, Leeuwenhoek found tiny twisting creatures, which he called “animalcules”.
His observations, which he reported to the Royal Society of London, are among the first descriptions of microbes（微生物）. Leeuwenhoek discovered an entire universe invisible to the human eye. He found different microbes in samples of pond water, rain water, and human blood. He gave the first description of red blood cells, observed plant tissue, examined muscle, and investigated the life cycle of insects.
Nearly two hundred years later, Leeuwenhock’s discovery of microbes helped French chemist and biologist Louis Pasteur to develop his “theory of disease”. This concept suggested that disease originates from tiny organisms attacking and weakening the body. Pasteur’s theory later helped doctors to fight infectious diseases including anthrax, diphtheria, polio, smallpox, tetanus, and typhoid. All these breakthroughs were the result of Leeuwenhoek’s original work. Leeuwenhoek did not foresee this legacy.
In a 1716 letter, he described his contribution to science this way: “My work, which I’ve done for a long time, was not pursued in order to gain the praise I now enjoy, but chiefly from a strong desire for knowledge, which I notice resides in me more than in most other men. And therefore; whenever I found out anything remarkable, I have thought it my duty to put down my discovery on paper, so that the scientific community might be informed thereof.”
1. Which of the following best describes Leeuwenhoek?| A．trained researcher with an interest in microbiology |
| B．A curious amateur who made pioneer studies of microbes |
| C．A talented scientist interested in finding a cure for disease |
| D．A bored cloth maker who accidentally made a major discovery |
| A．the discovery of microbes |
| B．Pasteur’s theory of disease |
| C．Leeuwenhoek’s contribution |
| D．the origin of the tiny organism |
| A．He admitted that many of his discoveries happened by chance. |
| B．He considered his work to be central to later medical breakthroughs. |
| C．He was greatly concerned with improving people’s living conditions. |
| D．He believed the sharing of knowledge was a key to scientific progress |
a. Magnifying lenses were built.
b. The “theory of disease” was put forward
c. Microbes were discovered in samples of waters.
d. Leeuwenhoek’s first microscopes were successfully developed.
e. Leeuwenhoek explained his thoughts upon his own contribution.
| A．a-d-c-e-b | B．d-a-c-e-b | C．a-c-d-b-e | D．d-a-e-b-c |
2 . A team of researchers at Brigham and Women’s Hospital, Harvard Medical School, has developed a system to use a smartphone camera to test for viral infections. In their paper published in the journal Science Advances, the group describes their system, which involves the use of an external microchip device and a smartphone system that uses a trained deep-learning algorithm.
As the pandemic has gripped the world for most of this year, scientists have been looking for ways to slow the spread of the next one. In this new effort, the team has developed a smartphone-based system that can be used by non-medical people to test for a variety of viral infections.
The system is made up of a smartphone, an external microchip device and software. Body fluid samples are placed into a channel on the microchip device, which is then dipped in a small amount of H2O2. The resulting reaction leads to the formation of bubbles. The bubbles develop in unique patterns based in part on viruses in the fluid sample. The user points their smartphone camera at the bubbling sample and starts the deep-learning algorithm that has already been trained to identify the patterns and therefore recognize the presence of viruses. The whole process takes about 50 minutes. The researchers have thus far taught their system to recognize just three viruses, Zika and Hepatitis B and C. But testing shows the system to be 99% accurate. They note that their system is more portable and cost-effective than other solutions in the works.
The researchers suggest that their system could be rapidly trained to recognize new viruses if the need arises, and the microchip device could be sent to hot spots in the future. Such technology, the researchers suggest, could help to stop future pandemics if used widely. The researchers also note that the system could be immediately useful in infection prone areas lacking testing labs.
1. What’s the purpose of the text?| A．To advise people to use a new smartphone camera. |
| B．To introduce the development of deep-learning algorithm. |
| C．To explain the invention of a new microchip device. |
| D．To show a new finding about testing for viral infections. |
| A．To educate ordinary people with medical skills. |
| B．To help prevent the pandemic from spreading fast. |
| C．To try to treat an illness with a smartphone camera. |
| D．To make smartphones more portable and powerful. |
①Bubbles of a liquid sample are formed. ②Samples react with H2O2.
③Fluid samples are collected in a special device. ④Viruses in bubbles are recognized automatically.
⑤The software is started to examine the bubbles.
| A．③②①⑤④ | B．③①②④⑤ |
| C．②③①⑤④ | D．②①③④⑤ |
| A．Indifferent. | B．Doubtful. | C．Confident. | D．Curious. |
3 . In work, as well as in life, doing what needs to be done in order to reach our goals can be difficult. Without a good system in place, it is easy to lose focus, waste time and lose track of our most important tasks. Luckily, one of the most efficient(高效的)useful ways is also one of the world's easiest---the Pomodoro Technique.
The Pomodoro Technique was developed by Francesco Cirillo in the late 1980s, which breaks down your work into 25-minute blocks(一段时间)divided by short breaks. Cirillo named the system after the tomato-shaped kitchen timer(计时器)that he used to track his work time when he was studying in university, where he developed a habit of doing short blocks of work followed by resting periods. He realized this method could help him work with time instead of struggling against it. In 2006, Cirillo published his Pomodoro Technique manual for people to download free of charge. It was downloaded over two million times.
The Pomodoro Technique was built around a handful of important steps. First, choose a task that you'd like to get done. It can be something big, something small, or something that you've been putting off for months. What matters is that you are ready to give it your full attention.
Next, set a timer for 25 minutes. Try to spend the full 25 minutes with your complete attention on the task. Then, when the timer goes off, take a five-minute break. Sit back, have a drink, go for a short walk, or do something else that doesn't relate to work. Treat yourself to a longer break that lasts 15 to 30 minutes after you have completed four of these 30-minute cycles. In theory, the longer break will allow your brain to relax, reset, ready for the next round of Pomodoros.
After trying the Pomodoro Technique, you may want to experiment a little. Some people have found that 90-minute blocks work best, while others might perform better with more flexible periods. It varies from person to person. Just remember, like many things in life, simpler is often better!
1. What can we know about Pomodoro Technique?| A．The technique was named after Cirillo. |
| B．Cirillo developed a habit of doing short blocks of work followed by resting periods in 2006. |
| C．Users of the technique can have a rest at intervals. |
| D．Cirillo got profits from Pomodoro Technique manual. |
a. Focus on the task.
b. Set out tasks.
c. Take a 5-minute break.
d. Take a longer break.
e. Repeat the cycle four times
| A．acebd | B．baced |
| C．bacde | D．acede |
| A．A 90-minute block works best. |
| B．Take a longer break that lasts 60 minutes will allow your brain to relax, reset, ready for the next round of Pomodoros. |
| C．The time setting depends on the users. |
| D．A simple Pomodoro can make things in life better. |
| A．The introduction of the Pomodoro Technique. |
| B．The invention of the Pomodoro Technique. |
| C．The use of the Pomodoro Technique. |
| D．The effect the Pomodoro Technique brings to people. |
4 . A man in Brisbane, Australia, survived a house fire early Wednesday morning because his pet parrot, named Eric, sounded the alarm.
Anton was asleep when his home caught fire just after 2:00 a.m., according to the Australian Broadcasting Corporation (ABC). Anton didn’t hear the smoke detector(探测器). Instead, he heard Eric calling his name repeatedly, ABC reported. “I heard a bang and Eric — my parrot— he started to yell so I woke up and I smelled a bit of smoke,” Anton told ABC. “I grabbed Eric, opened the door and looked to the back of the house and saw some flames,” he added. “And so I grabbed my bag and bolted downstairs.” Officials told ABC that Anton’s home did have a smoke detector, but it didn’t go off before Eric started calling “Anton! Anton!” Queensland Fire and Emergency Services Acting Inspector Cam Thomas told ABC that the firemen were able to contain the fire before it spread to other properties(财产).
According to ABC, there may be a crime(犯罪)and policemen are looking into what caused the fire. In the meantime, Anton is glad that he and Eric survived. “I’m in shock but I’m fine,” he told ABC. “Everything’s all right so long as I have myself and the bird.”
1. What is the right order of the following?a. Anton saw some flames.
b. Anton heard Eric calling his name.
c. Anton bolted downstairs.
d. Anton’s house caught fire at midnight.
e. Anton woke up and smelled the smoke.
| A．dbeac. | B．debac. | C．daebc. | D．deabc |
| A．Awkward | B．Lucky. | C．Shocked | D．Annoyed |
| A．Eric got badly injured in the fire. |
| B．The house was burnt to the ground. |
| C．Someone might have set fire to the house. |
| D．The police couldn’t find the cause of the fire. |
5 . The lander-ascender (上升器) combination of China's Chang’e 5 robotic lunar probe (探测器) has finished gathering subsurface samples and packed them in vacuum container and is continuing collecting surface samples, according to the China National Space Administration.
The administration said in a statement on Wednesday morning that the drilling and packing processes of rocks and soil from 2 meters beneath lunar surface concluded at 4:53 am. A mechanical arm is continuing gathering surface samples.
The combination landed on the moon at 11:11 pm on Tuesday, becoming the third spacecraft that has successfully touched down on the lunar surface this century. The first two aircraft that had achieved this are also from China — the Chang’e 3 and 4. The combination is tasked with collecting about 2 kilograms of samples.
China’s largest and most sophisticated lunar probe, Chang’e 5 was launched by a Long March 5 heavy-lift carrier rocket early on Nov 24 at the Wenchang Space Launch Center in Hainan province, undertaking the world’s first mission since 1976 to return lunar samples to Earth. The spacecraft is composed of four parts — orbiter (轨道飞行器), lander, ascender and re-entry capsule (返回舱).
Before the landing, Chang’e 5 separated into two parts — the orbiter-reentry capsule combination and the lander-ascender combination — in a lunar orbit early on Monday morning so as to prepare for the landing operation.
While the lander-ascender combination is carrying out surface operations, the orbiter-reentry capsule combination is traveling in a lunar orbit at an average altitude of around 200 km above the moon. After all surface operations are done, an engine on the ascender will lift it to meet the reentry module. It will transfer the lunar samples to the module and then separate from it.
The orbiter-reentry combination capsule will then return to the Earth’s orbit, where the pair will break up and the reentry capsule will return to a preset landing site in the Inner Mongolia autonomous region in mid-December.
If the mission is successful, it will make China the third nation to bring samples back from the moon, after the United States and the former Soviet Union.
1. What does the underlined word “sophisticated” in Paragraph 4 refer to?| A．Popular. | B．Advanced. | C．Necessary. | D．Difficult. |
a. landing on the moon.
b. separating Chang’e 5 into two parts.
c. launching Chang’e 5 lunar probe from the rocket.
d. collecting subsurface and surface samples.
e. returning to the Earth’s orbit.
| A．cbade. | B．baced. | C．bcaed. | D．cbdae. |
| A．Chang’e 5 has finished collecting samples on the surface. |
| B．The reentry capsule will return with the lunar samples. |
| C．The orbiter-reentry capsule will be together all the time. |
| D．The reentry capsule will return to the launch center. |
| A．In a travel brochure. | B．In a geography textbook. |
| C．In a science newspaper. | D．In a personal diary. |
6 . We are often told to pay attention to what our mothers tell us. Most of us enjoy listening to our mothers speaking. Scientists at Stanford University, US have found that compared to other people’s voices, our brains react strongly to our mother’s voices.
The scientists examined 24 children aged 7 to 12 and asked their mothers as well as two mothers whose children were not studied to record three nonsense words.“In this age period, most children have good language skills. We didn’t want to use words that had meaning because that would have involved(涉及) many different parts in the brain,”said Professor Menon.
The children’s brains were scanned while they listened to the nonsense-word recordings, produced by their own mother and other mothers. Even from very short recordings, less than a second long, the children could make sure of their own mother’s voice with greater than 97 percent accuracy(正确率). Hearing their mother’s voice makes many parts of children’s brains more active, including those about positive emotion and social communication.
Years of study has shown that children prefer their mothers’ voices and it starts even before they’re born. When children are still in the womb (子宫) or have just been born, they hear their mothers talking. This makes babies feel comfortable and safe and teaches them language and social skills, even though they are still very young. Later, when this sound is heard again, more attention is paid to it.
1. How many mothers were invited to enter the study?| A．12. | B．24. | C．26. | D．48. |
①Scientist scanned children’s brains.
②Children made sure of their mother’s voice.
③Mothers recorded nonsense words.
| A．①②③ | B．③①② | C．①③② | D．②③① |
| A．Because they can get a prize for doing so. |
| B．Because they enjoy listening to their mothers’ voices. |
| C．Because they can learn something and feel comfortable. |
| D．Because they can make sure of their voices more accurately. |
| A．Science. | B．Sports. | C．Family. | D．Health. |
7 . On the evening of June 21, 1992, a tall man with brown hair and blue eyes entered the beautiful hall of the Bell Tower Hotel in Xi’an with his bicycle. The hotel workers received him and telephoned the manager, for they had never seen a bicycle in the hotel ball before though they lived in “the kingdom of bicycles.”
Robert Friedlander, an American, arrived in Xi’an on his bicycle trip across Asia which started last December in New Delhi, India.
When he was 11, he read the book Marco Polo and made up his mind to visit the Silk Road. Now, after 44 years , he was on the Silk Road in Xi’an and his early dreams were coming true.
Robert Friedlander’s next destinations (目的地) were Lanzhou, Dunhuang, Urumqi, etc. He will complete his trip in Pakistan.
1. The best headline for this newspaper article would be _______.| A．The Kingdom of Bicycles |
| B．A Beautiful Hotel in Xi’an |
| C．Marco Polo and the Silk Road |
| D．An American Achieving His Aims |
| A．China, India, and Pakistan | B．India, China, and Pakistan |
| C．Pakistan, China, and India | D．China, Pakistan, and India |
| A．The stories about Marco Polo. |
| B．The famous sights in Xi’an. |
| C．His interest in Chinese silk. |
| D．His childhood dreams about bicycles. |
| A．clever | B．friendly | C．hardworking | D．strong-minded |
8 . The word "orange" describes both a color and a fruit. Which one came first might be surprising. "Orange" when used as the name of the fruit came before "orange" as a word to describe color. While the shade itself existed before the fruit, there was not a name in the English language for the color. Before the introduction of the fruit to English-speaking countries, the color was usually described as a shade of red or yellow.
In the early 16th century, Portuguese traders brought oranges from India to Europe. The Europeans had not seen the bright colored fruit before and didn't have a name for it. The fruits were named "narancia" by Italians and "narange" by the French and were sometimes referred to as "golden apples" by English speakers.
"Orange" was first used in a phrase to describe shades of colors, including in a third-century Greek text translated into English, in 1576. It describes Alexander the Great's servants as dressed in "orange colour velvet （天鹅绒）In 1578, a Latin-American dictionary defined "melites" as "a precious stone of orange color”. While orange represents the color of the objects, it needed the word "color" to follow it in order for the meaning to be clear. In the mid-1590s, Shakespeare described a beard as "orange tawny", one of the first instances of "orange" without the word "color" as part of the expression. Tawny is a brown color often used on its own. Orange was not yet a color, just a shade of brown.
In 1616, in an account describing varieties of tulips （郁金香）that can be grown, orange was used as a stand-alone color. When Isaac Newton performed his experiments on the color spectrum （色谱），he listed it as one of the seven basic colors. After almost half a century, orange was recognized as a color on its own.
1. Which is the right time order of the appearance of "orange"?| A．As a fruit→as a color→the shade itself. |
| B．The shade itself→as a color→as a fruit. |
| C．The shade itself→as a fruit→as a color. |
| D．As a color→the shade itself→as a fruit. |
| A．Melites. | B．Narange. |
| C．NaranciA. | D．Golden apples. |
| A．My ball is a melite. | B．The ball is orange colour. |
| C．The orange ball is beautiful. | D．I have an orange ball. |
| A．How to plant oranges | B．The spread of oranges |
| C．Orange used as a color | D．Shakespeare and oranges |
9 . Zoos have been around for centuries — and they’ve changed a lot over the years. In the Middle Ages, wealthy people kept animals in their gardens. Public animal parks appeared in European cities in the late 1700s and early 1800s. The Philadelphia Zoo, the first in the United States, opened in 1874.
Until a few decades (十年) ago, most zoos were organized by creatures — monkeys in one area, cats in another, birds somewhere else, just like museum collections. In recent years, zoos have instead begun grouping animals that would normally interact (互相作用) in the wild. Moreover, instead of closing animals behind bars, designers are creating landscapes like the environments in which these creatures would naturally be found. Nearby signs provide information about the animals and their habitats in parts of the world where they normally live.
The Denver Zoo’s new Predator Ridge exhibit, for example, aims to teach visitors about Africa. Eight acres of land provide homes for 14 animal species, including lions, porcupines, cranes, and wild dogs. Plants from the region grow alongside African-like landform. Ten-foot-tall mounds (土墩) give lions a place from which to survey their surroundings, just as they would do in the wild.
Landscape design makes visitors to the Denver Zoo’s Predator Ridge exhibit feel like they’re really in Africa.
Animals in Predator Ridge can’t actually be mixed with one another, for safety reasons. But hidden deep channels and other smart features allow visitors to see all the animals at once. Different species can see each other too.
1. What is the passage mainly about?| A．The safety problem of zoos. |
| B．The living habits of zoo animals. |
| C．Changes of zoos over the time. |
| D．Protection of zoo animals. |
a. Different species were kept in a group.
b. Zoos were organized by species.
c. Natural environments were created in zoos.
d. Animals were kept in people’s gardens.
| A．b; d; c; a | B．d; a; c; b | C．b; d; a; c | D．d; b; a; c |
| A．protect the safety of visitors |
| B．create a natural environment for lions |
| C．separate lions from other animals |
| D．offer visitors a better view of lions |
| A．the Denver Zoo | B．the Predator Ridge exhibit |
| C．Africa | D．the ten-foot-tall mounds |
| A．the earliest zoos were probably rich people’s gardens |
| B．the Philadelphia Zoo is the first zoo in the world |
| C．the new Predator Ridge exhibit is held in Africa |
| D．more animals will be kept in zoos in the future |
10 . One night in March, five years ago, during happy hour at a bar in my hometown, I made a surprise announcement to my friends: I was going to shut down my law practice and attempt to travel around the globe in a year. What’s more, I would do it without taking any flights or making a single advance reservation of any kind. My announcement drew mixed reactions from my friends. Some offered support and encouragement, while others were more doubtful.
Once I’d said the words, there was no turning back. It took months to shut down my law practice and get things in order. Once I set off on my adventure in October 2016, I found that travelling without using planes was not easy. Trying to circle the globe in 16 months (it took me a bit longer than the initial 12 months I planned) made it even tougher. Even so, travelling overland was the most awe-inspiring way to truly understand the immensity of our wonderful planet.
I took three consecutive overnight buses to travel 3,000 km through Argentina, from Ushuaia, the world’s southernmost city, to the capital Buenos Aires. I would look out the windows for hours on end at the completely unspoiled plains, as if humans had never touched it.
It took seven consecutive days and nights on trains to get from Moscow to Beijing, each day spent gazing out the windows for hours as the West Siberian Plain swept by. Sometimes, I wouldn’t see a village or a human being for 10 hours. Later in my journey, it took 22 days on a cargo freighter to get from New Zealand through the Panama Canal and back to Philadelphia, to finish my round-the-world adventure.
It turned out that travelling with no reservations was far less difficult than I had imagined. Pulling into a city on a bus with a backpack, looking in a guidebook for a few suggestions of accommodations, and then finding an empty room was never much of a problem anywhere. It also kept me flexible and open about all my travel plans, which is advice I give everyone who asks—plan far less than you think you should.
1. The author’s trip was special in that .| A．he made it at the expense of giving up his job | B．it hardly cost him anything |
| C．he did not make advance booking or travel by air | D．it was a global trip |
| A．June 2017 | B．December 2018 |
| C．October 2017 | D．February 2018 |
①Moscow ②Philadelphia ③New Zealand ④Ushuaia ⑤Beijing ⑥Buenos
| A．⑤④①⑥③② | B．④⑥①⑤③② |
| C．④⑤①⑥③② | D．⑤①⑥④③② |
| A．challenging but pleasing | B．dangerous but wonderful |
| C．boring and disappointing | D．costly and painful |
