1 . Improve Cloud Security
Sensitive customer data has constantly been found exposed on cloud servers without password protection. To ease the problem, database software makers have been trying to make security easier for cloud database managers. At the Enigma Conference in San Francisco, Kenn White, a security manager at database software maker MongoDB, will describe a new technique, called field level encryption, to make data safer on the cloud.
Field level encryption works by scrambling data before it’s sent to a cloud database and rearranging it in order when the data is needed for use. The promise of the product is to protect the contents of a cloud database, even if bad guys access it.
MongoDB’s new feature comes as more and more companies move user data to cloud servers, rather than run their own costly data centers. It was predicted that cloud computing would be a $214 billion industry by the end of 2019. That would be up more than 17% from 2018, when it was $182 billion.
Companies have rushed to the cloud without understanding all of the possible security consequences. Many companies have left countless databases exposed, revealing personal data. A database containing details about who lives in 80 million US households was left unprotected in 2019, just like the data on Facebook users.
Database managers want to store their data in an unreadable form, but they also want to be able to find specific pieces of information in the database with a simple search term. For example, someone might want to look up health care patients by their Social Security numbers, even if those numbers are stored as random characters. To make this possible, field level encryption lets database managers encrypt a search term on their machine and send it to the database as a query. The database matches the encrypted version of the search term with the record it’s storing and then sends it back to you.
This approach only works with specific kinds of data. For example, field level encryption isn’t useful for long text entries, like notes in a patient’s medical chart, because you can’t search for individual words.
Still, for data like account numbers, passwords and government ID numbers, field level encryption protects data and maintains a usable database.
Most importantly, White said, it’s simple to set up. Database managers turn it on with a one-time configuration change when they set up the database. “That’s really powerful,” he said in an interview.
1. The underlined word “scrambling” in paragraph 2 probably means________.| A．mixing | B．collecting | C．hiding | D．storing |
| A．Secure the safety of Internet pages. | B．Protect files with a unique style of storage. |
| C．Stop bad guys from accessing the database. | D．Enable companies to store files on the cloud. |
| A．Companies should move user data to cloud servers. |
| B．Cloud computing achieved a 17% increase in 2019. |
| C．Companies may be unaware of the risks of the cloud. |
| D．No companies were willing to run their own data centers. |
| A．present some facts | B．offer security advice |
| C．introduce a technique | D．recommend a product |
2 . This year's hottest destination is Mars. On 23 July, China launched the Tianwen-1 mission to the Red Planet — one of three spacecrafts' planning to head there in 2020. This is China's second interplanetary mission, but the first that the nation has launched on its own. The other, Phobos-Grunt, was a cooperation with Russia that didn't make it out of Earth's orbit after blasting off in 2011.
The new mission, called Tianwen, translated as "questions to heaven" — consists of an orbiter, a lander and a rover, the last of which will be named via a public competition. "It's very ambitious because it's a four-part mission: there's the launch, getting into orbit, the landing and the rover, and every single step has to go right, says space consultant Laura Forczyk. All those steps must work on the first try, an achievement no other space program me has accomplished on a Mars mission because of the difficulty of landing there.
If all goes well, Tianwen-1 will arrive at Mars in February 2021 and the lander and rover will touch down two or three months later. They will take pictures from the surface, measure the soil composition, make radar observations of the planet's underground structure and observe Mars's magnetic field. Due to the harsh environment on Mars, the rover is expected to last about 90 Martian days. It weighs around 240 kilograms, about the same as China's Yutu-2 rover, which is currently roaming the moon. "The Chinese mission to the far side of the moon has been hugely successful, so they are building on that success now," says Forczyk.
The orbiter, which will relay data from the lander and rover back to scientists on Earth, also carries a suite of scientific instruments. It has two cameras and a spectrometer (光谱仪), which it will use to create a map of the mineral composition of Mars's surface, as well as radar and detectors to examine particles in the Martian atmosphere. It will also look for deposits of water ice that could be helpful for future explorers.
Tianwen-1 won't be alone in Mars orbit. The United Arab Emirates has just launched its first mission to Mars, and NASA's Perseverance rover is set to launch on 30 July. These missions are all leaving now because Mars is at its closest point to Earth, which happens once every two years.
1. Which statement is true according to the first two paragraphs?| A．On 23 July, three countries launched space crafts to Mars. |
| B．Every step of Tianwen mission can be completed at several attempts. |
| C．The mission, Phobos-Grunt, cooperated with Russia was a great success. |
| D．Tianwen mission shows the pioneering efforts of China's space exploration. |
| A．Travelling around. | B．Floating past. | C．Wandering aimlessly. | D．Moving swiftly. |
| A．act as a detector to examine particles on the earth |
| B．search for a substance useful for future exploration |
| C．send information back to the earth collected from Mars |
| D．identify the position of minerals possibly lying on Mars |
| A．China's Successful Space Explorations |
| B．China Launching Missions to Mars |
| C．Tianwen, the First Interplanetary Mission |
| D．Mars, the Hottest Destination to Explore |
3 . Remember when your mom told you not to eat too many candy bars or sweets because they can cause tooth decay (蛀牙)? However, it turns out that chocolate can be more salutary to your teeth than you might expect. Recent studies show that chocolate can effectively fight against tooth decay, as if we need another excuse to eat chocolate.
Chocolate offers protection like fluoride, a main ingredient in most household toothpastes. Not only does chocolate protect our teeth, but it can do so very effectively. Studies show that chocolate has compounds that provide strong protection for teeth. One of the compounds in chocolate, CBH, is shown to protect even more effectively than fluoride.
Tooth decay happens when bacteria work to turn sugar into acids in our mouth. This is why eating foods with high sugar content can lead to more tooth decay. The compounds in chocolate, however, are anti-bacteria and can fight against bacteria in your mouth. The CBH compound in particular also works to strengthen tooth enamel (牙釉质), and protects against tooth decay.
Does this mean you can cat as much chocolate as you want without worrying about your teeth? It depends on the types of chocolate that you like. The protective effect of chocolate is most effective when you chew on cocoa beans. Of course, this option is not very appealing to; most people. A more tasty option is to choose dark chocolate with little sugar content, ideally no more than 6 to 8 grams per serving. For other types of chocolate with higher sugar content, the effect will be lessened. However, because of the protective compounds, it is still better for your teeth than other sweets and desserts containing the same amount of sugar.
1. The word “salutary” in paragraph 1 means?| A．Beneficial. | B．Harmful. | C．Familiar. | D．Useless. |
| A．It can help chocolate cure tooth decay. |
| B．It can effectively stop teeth from decaying. |
| C．It may protect teeth better than toothpastes do. |
| D．It may soon replace most household toothpastes. |
| A．By breaking down acids. | B．By building up compounds. |
| C．By fixing up tooth enamel. | D．By fighting against bacteria. |
| A．Chocolate plays the role of toothpaste. |
| B．Chocolate protects against tooth decay. |
| C．Chocolate is the best choice for teeth protection. |
| D．Chocolate is healthier to teeth than other sweets. |
4 . A sleepover (过夜) program, which is designed to make kids believe that their favorite toys enjoy reading, can help encourage children to pick up more books, a new study suggests.
Toys sleepover programs are designed to get children interested in books. Children take their toys to a library for the night. At this point, workers and volunteers take photos of the toys which explore the library and read books. The next day, the children collect their toys and the photos of what the toys did during the night. They are given the books their toys chose to read.
It was found that before the sleepover the children did not spend time looking at the books in their play area at preschool. Immediately after the sleepover, the number of children who read to the toys was higher than the number who did not, but after three days the effect decreased gradually.
The researchers also tested a method for sustaining the effect. They reminded the children of the sleepover a month later, by hiding the toys and showing them the photos again the next day. This simple method brought an increase in the number of children reading to their toys.
The study proves for the first time that children who take part in sleepover programs read picture books to their toys more. “We wanted to know if there really was an effect, and if so, how long it lasts. Surprisingly, not only did the children show interest in the books, but they also began to read to their toys. This means that a new behavior pattern appeared that the children hadn’t had before. We did not expect anything like this,” said one of the researchers.
Reading is important for the development of children’s language skills and imagination. When parents read to their children, it is a passive way of reading for the child. However, when children read to their toys, it is a more active, self-directed way of reading, helping them develop into more active readers, researchers said.
1. What is the purpose of the sleepover program?| A．To develop children’s language skills. |
| B．To help children to sleep well. |
| C．To encourage children to read more. |
| D．To guide children to form a good sleeping habit. |
| A．Go around the library with their toys. |
| B．Sleep with their toys. |
| C．Read together with their toys. |
| D．Take their toys to the library. |
| A．keeping | B．testing | C．surveying | D．showing |
| A．Children showed no interest in the books. |
| B．The effect of the sleepover program could last long. |
| C．Children began to read to their toys on their own. |
| D．Whether the sleepover program had an effect remained unknown. |
5 . Social distancing is not a new concept in the natural world, where infectious diseases are commonplace. Through specialized senses animals can detect certain diseases and change their behavior to avoid getting ill.
In 1966, while studying chimps (猩猩) in a Tanzanian national park, zoologist Jane Goodall observed a chimp named McGregor who had caught a highly infectious virus. His fellow chimps attacked him and threw him out of the troop. In one instance, McGregor approached chimps in a tree. He reached out a hand in greeting, but the others moved away without a backward glance.
“For a full two minutes, old McGregor sat motionless, staring after them,” Goodall notes in her 1971 book In the Shadow of Man. “It’s really not that different to how some societies react today to such a tragedy.”
Not all animals are so aggressive toward their ailing neighbors. Sometimes it’s as simple as avoiding those who may infect you.
When Kiesecker, a lead scientist in America, studied American bullfrog in the late 1990s, he found that bullfrogs could not only detect a deadly smell of infection in other bullfrogs, but healthy members actively avoided those that were sick. Bullfrogs rely on chemicals signals to determine who is sick or not.
Caribbean lobsters also shun diseased members of their community, well before they become infectious. It takes about eight weeks for lobsters infected with the deadly virus Panulirus argus mininuceovirus to become dangerous to others. Normally social animals, lobsters begin keeping away from the diseased as early as four weeks after infection – once the lobsters can smell certain chemicals released by sick individuals.
Overall, it’s important to note that, unlike us, animals don’t realize if they stay home, they might actually reduce the infection rate,” Kiesecker explains. “As humans, we have that ability. It’s a big difference.”
1. What can we learn about the chimps from Goodall’s observation?| A．They kept a distance from one another. |
| B．They became aggressive when infected. |
| C．The infected avoided contact with others. |
| D．The infected were forced to leave the group. |
| A．Avoid. | B．Cure. | C．Get rid of. | D．Get along with. |
| A．Humans are more sensitive to virus. |
| B．Humans are less likely to get infected. |
| C．Humans treat infectious diseases in a wiser way. |
| D．Humans can detect chemical signals more quickly. |
| A．Help Me Out |
| B．Leave Me Alone |
| C．Stay Away From Us |
| D．Stay Home Stay Healthy |
6 . Google’s self-driving car is designed to work without a gas pedal (踏板) or steering wheel (方向盘). Now, the company has decided that the car doesn’t have any windscreen wipers either, because there’s no need for passengers to see where they are being driven.
The car requires no input from a driver, except telling it the destination. There is no driving in the way we know it and all people inside the cars will be passengers who can spend their time paying no attention to the road. While the car may not need windscreen wipers, the absence of them may make passengers feel helpless if they are unable to see where they are going clearly.
Google’s two-seater “bubble” cars have buttons to begin and end the drive, but no other controls. An on-board computer uses data from sensors, including radar (雷达) and cameras, to make turns and keep away from people walking in the street and other vehicles. Under the vision made public by Google, passengers might set their destination by typing it into a map or using voice commands. The new car can’t go faster than 25 miles per hour (40 km/h). It is electric and has to be recharged after 80 miles (129 km). They can only be used in areas that have been thoroughly mapped by Google.
Google has been testing its self-driving cars since 2009 and its new model without a steering wheel since early this summer. It intends on making its driverless cars available to consumers in the next five years. The final goal of the project is computer-controlled cars that can get rid of human error, which results in about 90 percent of the 1.2 million road deaths worldwide each year and it was also inspiring to start with a blank sheet of paper.
1. Why may people feel helpless riding in Google’s self-driving car?| A．There are no other controls. | B．They have no idea of the destination. |
| C．They are unable to see the road clearly. | D．The car is traveling too fast. |
| A．The tests the car needs to pass. |
| B．How Google’s self-driving car works. |
| C．The development of the new car. |
| D．What the drivers need to drive the car. |
| A．Filled with electricity. |
| B．Repaired from time to time. |
| C．Asked for some money again. |
| D．Designed into a new style. |
| A．Google began to test self-driving cars this summer. |
| B．Driverless cars will be available to consumers next year. |
| C．Google’s computer controlled cars fire the drivers’ inspiration. |
| D．Most of the road deaths are caused by drivers. |
7 . Some people say global English is no longer just controlled by British or American English,but is running free and developing uniquely local forms.Can you figure out the following terms?
“I like your smile,but unlike you put your shoes on my face.”This is a way of saying“Keep off the grass.”Or“people mountain,people sea”,which means“very crowded”.
These examples are what we call Chinglish.When it comes to Chinglish,if all you know is“good good study,day day up”,you will be considered“out man”.
Nowadays,more Chinglish words have been created,for example,a Chinese idiom is translated as“smilence”,a combination by the English word smile and silence.
Chinglish usually offers a humorous look at misuses of the English language in Chinese street signs,products,and advertising.They are favoured by some English speaking tourists and visitors.Dominic Swire has been living in Beijing for a couple of years.“I think many Chinese people complain about the Chinglish and badly translated English.But you know,sometimes for us foreigners,it’s actually quite charming to see them.I think if the translations of English in China were all perfect,then something would be lost from Chinese culture.”
However,Chinglish will probably become a“cultural relic”in the near future.Beijing has made a comprehensive plan to improve foreign language services and correct Chinglish within five years.“It is very ridiculous to see Chinglish on the signs in some scenic spots.And they are a kind of barrier for communication between Chinese and people from other countries,”a Beijinger said.
Some Chinese university experts side with Chinglish.They argue that English has absorbed elements from other languages such as French and Spanish in its growth,and now it’s Chinese’s turn.
1. What can we call Chinglish?| A．English words which get new Chinese meanings. |
| B．The Chinese words which are difficult to translate. |
| C．The words combining English vocabulary and Chinese grammar. |
| D．The local words preventing foreigners from learning Chinese well. |
| A．Saying nothing but to smile. | B．Smiling without being noticed. |
| C．Laughing at somebody. | D．Knowing little about speech. |
| A．It can show the humour of Chinese. | B．It will attract more foreign tourists. |
| C．It helps him to learn Chinese well. | D．It seems part of Chinese culture. |
| A．Because it has become a unique bridge between Chinese and English. |
| B．Because Chinglish is a chance to enrich Chinese and English. |
| C．Because it improves the understanding between Chinese and foreigners. |
| D．Because Beijing is determined to get rid of Chinglish signs. |
8 . A little boy almost thought of himself as the most unfortunate child in the world because poliomyelitis (小儿麻痹症) made his leg lame and his teeth uneven. He seldom played with his classmates; and when the teacher asked him to answer questions, he always lowered his head without a word.
One spring, the boy’s father asked for some saplings (树苗) from the neighbor. He told his children to plant a sapling each person. The father said, “Whose seedling grows best, I will buy him or her a favorite gift.” The boy also wanted to get his father’s gift. But seeing his brothers and sisters carrying water to water the trees happily, anyhow, he hit upon an idea: he hoped the tree he planted would die soon. So watering it once or twice, he never attended to it.
A few days later, when the little boy went to see his tree again, he was surprised to find it not only didn’t wilt, but also grew some fresh leaves, and compared with the trees of his brother and sister, his appeared greener and more vital. His father kept his promise, bought the little boy his favorite gift and said to him: from the tree he planted, he would become an outstanding botanist when he grew up.
Since then, the little boy slowly became optimistic. One day, the little boy lay on the bed but couldn't sleep. Looking at the bright moonlight outside the window, he suddenly recalled what the biology teacher once said, plants generally grow at night. Why not go to see the tree? When he came to the courtyard on tiptoe, he found his father was splashing something under his tree with a ladle (勺子). He returned to his room, tears running down his face.
Decades passed. The little boy didn’t become a botanist, but he was elected President of the United States. His name was Franklin Roosevelt.
1. Why didn’t the boy answer the teacher’s question?| A．He couldn’t concentrate on the class. |
| B．All the students looked down on him. |
| C．He lacked confidence because of his illness. |
| D．He was an unfortunate boy with learning disability. |
| A．The neighbor required him to do it. |
| B．He expected them to be botanists. |
| C．He wanted to encourage the disabled boy. |
| D．The children asked for their favorite gifts. |
| A．Become weak. | B．Become strong. |
| C．Become beautiful. | D．Become green. |
| A．An Unfortunate Boy |
| B．Nutrition of Growth |
| C．A Loving Father |
| D．The Unselfish Love |
9 . When you were at school, the last thing you probably wanted to do was to spend your weekends going to work. There was homework to do, sport to play and fun to have. But our parents probably persuaded us to find a job to earn some money and get some life experience. When I was a teenager I had a paper round: delivering newspapers to people’s homes.
Today in the UK you are allowed to work from the age of 13, and many children do take up part-time jobs. It’s one of those things that are seen almost as a rite of passage (成人仪式) .It’s a taste of independence and sometimes a useful thing to put on your CV (简历). Teenagers agree that it teaches valuable lessons about working with adults and also about managing their own money.
Some research has shown that not taking up a Saturday or holiday job could be deleterious to a person later on. A 2015 study by the UK Commission on Employment and Skills found that not participating in part-time work at school age had been blamed by employers’ organizations for young adults being ill-prepared for full-time employment, but despite this, recent statistics have shown that the number of schoolchildren in the UK with a part-time job has fallen by a fifth in the past five years.
So does this mean that British teenagers are now afraid of hard work? Probably not. Some experts feel that young people feel going out to work will affect their performance at school and they are under some pressure now to study hard and get good exam result and a good job in the long term. However, Geoff Barton, general secretary of the Association of School and College Leaders, told BBC News that “Properly regulated part-time work is a good way of helping young people learn skills that they will need in their working lives.” In reality, it’s all about getting the right balance between doing part-time work and having enough time to study and rest.
Many young people actually want to work because it gives them a sense of freedom. One 13-year-old girl called Rachel, who has a Saturday job in a shop, told the BBC that “I enjoy my job because I’m earning money and it helps me socialize with people I work with.” That seems like something worth getting up for a Saturday morning. Did you do a part-time job when you were at school?
1. What can we conclude from Para 2?| A．Students taking up part-time jobs are more independent. |
| B．Taking up part-time jobs can help students save money. |
| C．Taking up part-time jobs is good for students in many ways. |
| D．Children over 13 in the UK must take up part-time jobs. |
| A．important | B．harmful |
| C．threatening | D．beneficial |
| A．Students with good grades and no study pressure can do part-time jobs. |
| B．Students should put all their energies into their studies. |
| C．The more part-time jobs they do, the more beneficial it is for students. |
| D．It is good for students to do part-time jobs as long as they are proper. |
| A．Should schoolchildren have part-time jobs? |
| B．What kind of part-time job should schoolchildren do? |
| C．What benefits can part-time jobs bring to schoolchildren? |
| D．Why do British schoolchildren show less interest in part-time jobs? |
10 . Two of the saddest words in the English language are “if only(要是……就好了)”. I live my life with the goal of never having to say those words, because they convey regret, lost opportunities, mistakes, and disappointment.
My father is famous in our family for saying “Take the extra minute to do it right.” I always try to live by the “extra minute” rule. When my children were young and likely to cause accidents, I always thought about what I could do to avoid an “if only” moment, whether it was something minor like moving a cup full of hot coffee away from the edge of a counter, or something that required a little more work such as taping padding (衬垫) onto the sharp corners of a glass coffee table.
I don’t only avoid those “if only” moments when it comes to safety. It’s equally important to avoid “if only” in our personal relationships. We all know people who lost a loved one and regretted that they had foregone an opportunity to say “I love you” or “I forgive you.” When my father announced he was going to the eye doctor across from my office on Good Friday, I told him that it was a holiday for my company and I wouldn’t be here. But then I thought about the fact that he was 84 years old and I realized that I shouldn’t give up an opportunity to see him. I called him and told him I had decided to go to work on my day off after all.
I know there will still be occasions when I have to say “if only” about something, but my life is definitely better because of my policy of doing everything possible to avoid that eventuality. And even though it takes an extra minute to do something right, or it occasionally takes an hour or two in my busy schedule to make a personal connection, I know that I’m doing the right thing. I’m buying myself peace of mind and that’s the best kind of insurance for my emotional well-being.
1. Which of the following is an example of the “extra minute” rule?| A．Start the car the moment everyone is seated. |
| B．Leave the room for a minute with the iron working. |
| C．Wait for an extra minute so that the steak tastes better. |
| D．Move an object out of the way before it trips someone. |
| A．take up | B．stay away |
| C．run out of | D．give up |
| A．keep her appointment with the eye doctor |
| B．meet her father who was already an old man |
| C．join in the holiday celebration of the company |
| D．finish her work before the deadline approached |
| A．The Peace of Mind | B．The Most Useful Rule |
| C．The Two Saddest Words | D．The Emotional Well-being |
