1 . 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. |
2 . Planning to go to a gym? If you are one of those who have spent many days planning to join a gym or to attend it regularly, then why not choose some home exercises? Here are some home exercises without equipment.
Jumping jacks
This one is the best home workout without weights, which is a great exercise that will work your hands and legs. Perform this exercise by standing with your feet placed together and arms at your sides. Now tuck in your abs (收腹) and jump by bending your knees. At the same time, move your feet apart as much as you can and raise your hands to bring into line with your shoulders. While you come back you must be in a starting position, feet together, hands at sides and knees bent. You must land on your heels and again jump.
Jogging
Jogging is one of the best home exercises without weights. You don’t need to have a lawn or jogging track at home to perform this exercise. There are many benefits of jogging. It will work your entire legs. Moreover, it is a classic cardiovascular (心血管的) workout. Make sure you wear jogging footwear even if you are jogging at home to avoid any stress on your feet. Also, you can gradually increase the jogging time and speed.
Rotating (旋转) exercise
Start by rotating your wrists, clockwise (顺时针方向地) and anticlockwise. Now, alternately rotate your feet in the same fashion. Now place both your hands on the shoulders and start rotating your shoulders clockwise and anticlockwise. Place an exercise mat and lie flat on your back. Now lift your left leg and rotate it clockwise; do not bend your knees. Now rest the left leg, lift your right leg and rotate it
Anticlockwise
It is necessary to set a perfect mood for exercise which will help you stick to the exercise routine and excitement. Make sure you wear proper exercise clothes to perform the workout with ease. Also, putting on your favorite music will make your exercise session more lively. If you get bored with exercises, just dance, after all it’s also one of the best home exercises.
1. While jogging at home, you__________.| A．may exercise your body entirely |
| B．had better choose a pair of proper shoes |
| C．should find a space as the jogging track first |
| D．must stick to a fixed time and speed |
| A．Hands-legs-back-legs. |
| B．Wrists-hands-feet-shoulders. |
| C．Wrists-feet-shoulders-legs. |
| D．Hands-shoulders-knees-legs. |
| A．a good mood and atmosphere |
| B．a good coach |
| C．a professional teacher |
| D．a good timer |
3 . Shoppers in the United States have many different retail stores (零售店) to choose from. You can shop at large department stores, furniture stores, jewelry stores, electronic equipment stores and many others. Another type of retail store—the catalog store, has become popular in the U.S.
Catalog stores offer much of the same goods as traditional retail stores. However, in these stores, shoppers select the items they wish to buy from large catalogs that are filled with photos and descriptions of all the different goods. The variety of products listed in the catalogs includes everything from baby clothing to video equipment and watches. The prices of these items are very low. In fact, the same items often cost more in other retail stores. And that’s the reason many people prefer to shop in catalog stores.
When shoppers go to a catalog store, they see many brand-name products on display. If they are interested in purchasing an item, they need to follow this simple procedure.
●First, they go to a counter to find the store’s catalog.
●They look in the catalog to find the exact item they wish to buy.
●Then, they fill out an order form with the name of the item, the item number from the catalog, the price, and their name and address.
●After completing the form, the customer gives it to a salesperson, who checks to see if the item is in stock.
If the item is available, the stockroom sends it on a conveyor belt (输送带) to the pick-up counter. When the item arrives at the pick-up counter, the customer’s name is called, and the customer pays for the item.
The whole procedure usually takes ten to twenty minutes. If the item isn’t available, the salesperson can usually check the store’s computer and find out when it will be in stock again.
Catalog stores usually don’t offer all the services that regular retail stores do. They usually don’t have many salespeople, so customers can’t expect to receive much assistance or attention from store employees. Customers need to know about the features and the quality of the items they wish to buy before they shop, since there isn’t much opportunity to ask questions or examine the product in the store. However, catalog stores offer quality items at lower prices, and consumers seem to appreciate this.
1. What is the difference between the traditional retail stores and the catalog stores?| A．The prices of products in catalog stores are higher. |
| B．Shoppers select the items they need from large catalogs. |
| C．Catalog Stores offer more products than the traditional stores. |
| D．Catalog stores usually offer all the services that regular retail stores do. |
①Check the catalog to select the items.
②Fill out the order form.
③Wait at the pick-up counter.
④Find a catalog at a counter.
⑤Find a salesperson to cheek the form.
| A．④-①-③-⑤-② | B．①-④-②-③-⑤ |
| C．④-①-②-⑤-③ | D．④-②-⑤-③-① |
| A．become salespeople now |
| B．do the same as in retail stores |
| C．have more chances to examine the goods |
| D．should know the information of the goods ahead |
| A．offer quality goods at lower prices |
| B．have many salespersons for service |
| C．can help save much time when doing shopping |
| D．offer the exact items the customer wishes to purchase |
4 . We can express thoughts and feelings and send sounds and pictures on our smartphones today. We also communicate using programs like Skype and Face Time. We can’t send tastes, smells or touch like people do in the real world, of course. Professor Adrian David Cheok at City University in London is trying to develop a way for smartphones to do just that.
To give users a sense of taste, researchers designed two electrodes (电极) that are placed on the tongue. A chemical process creates different tastes through molecules (分子) on the surface of the tongue. This chemical process sends electrical signals that convince the brain that a person is tasting something. They have already created sour, salty, sweet and bitter tastes. “You put your tongue between these two silver electrodes and then it stimulates your tongue electrically and you get a virtual taste sense in your brain.”
A device called Scentee permits users to have the sense of smell. Scentee plugs into a smartphone and can spray (释放) tiny clouds of fragrances (气味), including flowers, fruit and coffee. Professor Cheok says the person speaking can activate the device. “Basically what happens is that we have an app, it connects to the Internet and then this will release a scent from your mobile phone.” Scentee holds a container with about 100 different smells. The container must be replaced when all the scents run out.
The sense of touch comes from a ring-like device. It is connected wirelessly to the smartphone. The device sends a soft, electrical squeeze (挤压) when a person on the other end of a telephone conversation does the same. Professor Cheok says this permits a kind of wireless touch communication. “I can be in London and my friend can be in Tokyo, and I can squeeze my finger and then he’ll get a squeeze on his finger through the Internet. It’s a way of touch communication with small mobile devices.”
1. Which of the following functions of smartphones is NOT referred to in the text?| A．Sending tastes. |
| B．Sending smells. |
| C．Sensing the owner’s feelings. |
| D．Touching people you are communicating with through the phone. |
①A chemical process creates different tastes on the tongue.
②Put the tongue between the two electrodes.
③The tongue is stimulated electrically.
④The chemical process sends electrical signals to the brain.
| A．①②③④ | B．③④①② | C．②③①④ | D．③①②④ |
| A．Adjust. | B．Encourage. | C．Promote. | D．Operate. |
| A．explain a new kind of technology |
| B．describe some future uses of smartphones |
| C．show the effects that smartphones have on people |
| D．advise people to keep in close contact through smartphones |
5 . Scientists estimate that over 500 million species have died out throughout evolution. Here is a list of 4 incredible extinct animals.
Pinta Island Tortoise
| The giant tortoise of Pinta lived on the island Pinta of the Galapagos Islands,Ecuador. By the end of the nineteenth century,most of the Pinta Island tortoises had been wiped out due to hunting. The last known individual was a male named Lonesome George who died on 24 June 2012. In his later years,he was considered the rarest animal in the world. |
Falkland Islands Wolf
| The Falkland Islands wolf was the only native land mammal of the Falkland Islands. The animal was hunted for his beautiful fur,and the shepherds(牧羊人），considering it a threat to the sheep,poisoned him. On the islands,there were no forests in which the species could take shelter,and its lack of fear towards man made it easy prey to kill. The last known individual died in the late 19th century on the western island. |
Caucasian Wisent
| The Caucasian wisent which went extinct in 1926 inhabited(栖息）the Caucasus mountains. In 1910 their numbers were estimated in the hundreds. When state authority collapsed after the First World War,the remaining population fell victim to hunters. The decline can also be contributed to an outbreak of foot-and-mouth disease that was introduced with cattle. |
Javan Tiger
| The Javan tiger is an extinct subspecies of the tiger that was native to the Indonesian island of Java. Very little data was gathered about their behavior before they were driven to extinction. The reduction of its two main prey species,and the modification of its habitat led to the extinction of the subspecies in the 1980s. |
1. According to the passage,which shows the correct order of the animals' extinction?
① Pinta Island tortoise ② Falkland Islands wolf
③ Caucasian wisent ④Javan tiger
| A．②③①④ | B．②③④① |
| C．③②④① | D．③④②① |
| A．Pollution. | B．Disease. |
| C．Hunting. | D．Habitat loss. |
| A．A travel brochure. | B．A news report. |
| C．A nature magazine. | D．A biology textbook. |
6 . The Hodgeheg
By now it was quite late. The rush hour was over. The shops were shut. All was quiet. I'll wait, thought Max, and then when a car or truck comes along, I'll cross in front of it.
Soon he saw something coming. It was a truck. He was halfway across when he suddenly realized that the truck hadn't slowed at all and was almost on top of him, blinding him with its brilliant lights, deafening him with its thunderous roar. It was not going to stop! Trucks stopped only for people-not hedgehogs!
The truck driver had been quite unaware of the tiny pedestrian. With no time to brake, he straddled the little animal. Looking back in his mirror, he saw that it was continuing on its way unhurt, and he grinned and drove on into the night.
The horror of this great monster passing above with its huge wheels on either side of him threw Max into a blind panic, and he made for the end of the crossing as fast as his legs would carry him. He did not see the cyclist and the cyclist, who did not see him until the last moment, caught Max on the bottom and threw him headfirst into the roadside.
The next thing that Max recalled was crawling painfully. Somehow he had managed to come back. He had known nothing of the concern of the cyclist, who had stared at what looked like a small dead hedgehog, sighed, and rode sadly away. He remembered nothing of his journey home, guided only by his sense of smell. All he knew was that he had an awful headache.
The family crowded around him on his return, all talking at once.
“Where have you been all this time?” asked Ma.
“Are you all right, son?” asked Pa.
“Did you cross the road?” they both said, and Peony, Pansy, and Petunia echoed, “Did you? Did you? Did you?”
For a while, Max did not reply. His thoughts were muddled(混乱的), and when he did speak, his words were disordered, too.
“I've got a head on the bump,” he said slowly.
The family looked at one another.
“Something bot me on the hittom,” said Max, “and then I headed my bang. My ache bads headly.”
“But did you cross the road?” cried his sisters.
“Yes,” said Max. “I hound where the humans cross over, but…”
“But the traffic only stops if you're a human?” interrupted Pa.
“Yes,” said Max. “Not if you're a hodgeheg.”
1. What's the correct order of the events that happened?① Max got hit on the bottom and bumped the head.
② Max explained what led him to such a situation.
③ Max was surrounded by the family who were curious and concerned.
④ Max waited for the chance to cross the street.
⑤ Max narrowly escaped being hit by the truck.
⑥ Max managed to return home.
| A．④⑤①⑥②③ | B．④⑤①⑥③② | C．④①⑤⑥②③ | D．④①⑤⑥③② |
| A．Max wanted to find out how to cross the road safely when a vehicle came along. |
| B．Max was seriously injured, so he hurried to the end of the crossing. |
| C．The cyclist sighed sadly because he believed the truck driver had killed Max. |
| D．Peony, Pansy, and Petunia,who echoed “Did you?” were Max's brothers. |
| A．The writer intends to convey some moral ideas to his readers. |
| B．Readers may wonder what is special about the writer's writing techniques. |
| C．It is typical of writers to be creative and try unique ideas. |
| D．Readers' curiosity can be aroused and they will continue reading. |
| A．Serious. | B．Concerned. | C．Casual. | D．Humorous. |
| A．Science fiction. | B．Travel brochure. |
| C．Children's tales. | D．Traffic guidebook. |
7 . By the mid-1920s, Pablo Picasso, one of the most influential artists of the 20th century. had been one of the most celebrated men .In 1957, when Pablo Picasso was in his seventh decade, he joked that x-ray technology might one day reveal a lost work underneath one of his early paintings. Today, that prediction became reality although the technology involved goes far beyond x-rays.
Using hyper-modern tools to peer into one of his Blue Period paintings, researchers have not only shown a hidden piece of art history in astonishing new detail, they have revealed a striking amount of insight into Picasso's creative process and style.
The investigation focused on"La Miséreuse accroupie, "or" Crouching Woman, "painted in 1902 and currently owned by the Art Gallery. The painting, an oil on canvas (画布) piece drawing a crouching (蜷坐的) woman who wears a long coat, shows Picasso’s typical Blue Period colors: grey, green, blue and white. It shows that the innovative modernist was inspired by the lines of an underlying landscape painted by an unknown artist.
The analysis also exposes several changes to the woman described in the painting,many of which Picasso ultimately abandoned. Researchers released their findings on Saturday’s press conference of the American Association for the Advancement of Science in Austin, Texas. “We think now it's a landscape painted by someone enrolled at the fine arts academy in Barcelona, someone in Picasso’s orbit but not in his close circle, ”says Kenneth Brummel, assistant curator of modern art for the Art Gallery of Ontario.
As to why Picasso would have “recycled” another artist’s canvas(油画布), reasons could range from economic necessity, as a young artist still establishing himself, to deep inspiration driven by the lines of the image already laid down there. Picasso often re-used canvases for this reason."
“He didn't shave off the canvas or put a preparatory layer over it,” Brummel says.“ Picasso saw this landscape, found inspiration, and decided he was going to paint it immediately."
1. According to the text ,the most likely process of Picasso's painting?①Picasso reused another artist's canvas.
②Inspired by a landscape painting, Picasso decided to paint one too.
③Picasso painted a woman on the landscape painting.
④Not happy with the landscape, Picasso covered it totally.
⑤Picasso made changes to the woman
| A．②③④ | B．④②③ |
| C．①③⑤ | D．②①④ |
| A．He reused it because he hated wasting anything. |
| B．He hid his own paintings beneath the landscape. |
| C．He took the advantage of it and created a new one. |
| D．He kept it to himself with the permission of its owner. |
| A．People often celebrated Picasso’s success. |
| B．Picasso was not well-off when he started his career. |
| C．Picasso became successful overnight. |
| D．Picasso was good at imitating other artists’ works. |
| A．Picasso's predication turned out to be joke. |
| B．High technology uncovered art mysteries. |
| C．Seeing is not always believing. |
| D．Lost Artwork Found Under Famous Picasso Painting. |
