1 . Have you ever noticed that the stars sometimes appear brighter in December, January and February? There's a link between cold air and the night lights. "Part of it is that it tends to be drier in the winter," said Diane Tumshek, an astronomer at Carnegie Mellon University in Pittsburgh, Pennsylvania. Even though it's invisible, moisture can change the way light moves through the air. And in the summer, moisture can make stars appear more dull.
Air temperature is also what puts the twinkle twinkle in the little stars. "Even on very clear nights, some of the atmosphere is cooler, and some of the atmosphere is warmer,” said Tumshek, who also works with the Allegheny Observatory. And when the light from a star passes through those bubbles of varying temperatures, "it bends and shifts the light, so that we are seeing stars appear to dance or twinkle,” she said.
For star lovers in the United States, there's another factor that comes into play for bright winter stars, although this is a matter of coincidence. During Earth's journey around the sun, “there are just simply more bright stars visible from the Northern Hemisphere in the winter sky," Tumshek said. If you really want to see a shiny star, just try to find a burning ball of gas called Sirius near the horizon. At 8.6 light-years away, Sirius is relatively close to Earth and the brightest star visible in the night sky. It is also large — nearly twice as big as our sun and 20 times as bright. So this winter, when the world turns cold and it seems like we should be spending more time indoors, consider asking an adult to go exploring outside. With a warm coat and a clear sky, any night can be turned into a treasure hunt. All you have to do is look up.
1. What does the underlined word "dull" in Paragraph 1 probably mean?| A．not shiny | B．not exciting | C．not severe | D．not smart |
| A．By changing the bubbles around them. | B．By putting the twinkle twinkle in them. |
| C．By varying the direction of the light from them. | D．By making the stars dance and twinkle in the sky. |
| A．It can be found at any night. | B．It is 20 times as bright as the sun. |
| C．It is a burning and shiny ball. | D．It is closer to Earth than other stars, |
| A．To advocate stargazing in winter, | B．To call on people to focus on stars. |
| C．To present new research results about stars. | D．To explain why stars are more visible in winter. |
2 . Since apps like Uber and Lyft came on the scene, ridesharing services have dramatically changed the way people get around. A new study out of Columbia University reveals a downside of these services. It turns out that ridesharing trips cause an increase in the number of accidents involving motorists and pedestrians at pick-up and drop-off locations.
Previous studies on the relationship between ridesharing services and vehicle crashes compare cities where ridesharing services are available with cities where they are not, and this makes results somewhat ambiguous. In this study researchers analyze individual trips to make the picture a little clearer.
Researchers analyzed data from 372 million ridesharing trips in New York City between 2017 and 2018. Whenever a crash occurred in the city, they calculated the number of ridesharing trips that began or ended in the area at the time of the accident. They compared this with the number of trips that took place in the same location one week before and one week after the crash. Researchers did the same calculations for regular taxi rides as part of their analyses. Also, separate analyses were performed based on the type of people injured in the crash: pedestrians, motorists or cyclists.
The results of the analyses show that the rise in ridesharing trips is associated with an increase in the number of accidents involving pedestrians and motorists, but not cyclists. Furthermore, they did not find this same association between taxi trips and accidents.
“Ridesharing is changing the way we move around cities.” says first author Christopher Morrison. “It is becoming clear that the technology reduces alcohol-related crashes, but these benefits do not seem to extend to the overall number of crashes. These findings help explain why that might be---- because the reductions in alcohol-related crashes are offset (抵消) by increases in other types of crashes.”
Researchers hope that cities and ridesharing services will use the results of this study to take measures that might reduce the number of crashes. “In crowded areas with large numbers of rideshare pick-ups and drop-offs, cities could consider building taxi-rank style infrastructure (基础设施) to protect pedestrians and prevent crashes, ”concludes Morrison.
1. What do we know about previous studies on ridesharing services?| A．Their analysis is hardly reliable. |
| B．Their findings are rather ridiculous. |
| C．Their research method is out-of-date. |
| D．Their research sample is not wide enough. |
| A．The increase in ridesharing trips can lead to an increase in accidents between cyclists and pedestrians. |
| B．When there is a high number of ridesharing trips, there is usually an increase in the number of accidents. |
| C．Ridesharing is changing the way we move around cities. |
| D．Cyclists are always safe. |
| A．Ridesharing reduces alcohol-related crashes. |
| B．Ridesharing doesn’t increase accidents involving cyclists. |
| C．Various types of crashes increase with ridesharing services. |
| D．Overall crashes don’t decrease along with alcohol-related crashes. |
| A．Improving infrastructure to expand taxi services. |
| B．Banning ridesharing services in crowded places. |
| C．Constructing some stops for ridesharing vehicles. |
| D．Reducing the number of pick-ups and drop-offs. |
3 . Earthquake rescue robots have experienced their final tests in Beijing. Their designers say with these robots, rescuers will be able to buy more time to save lives during an earthquake.
This robot, looking like a helicopter, is called the detector (探测器) bot. At about 4 metres long, it took about 4 years to develop the model. Its main functions are to collect information from the air, and deliver goods of up to 30 kilos to people trapped by an earthquake.
This robot is equipped with a high 360degree panoramic (全景的) camera. It can work day and night and also be able to send the latest pictures from the quake area.
Dr Qi Juntong, from Chinese Academy of Sciences, said, "The most important feature of this robot is that it doesn't need distant control. We just set the information on it, and then it takes off, and lands by itself. It flies as high as 3,000 metres, and as fast as 100 kilometres per hour."
This robot has a different function — it can change as the environment changes. Its main job is to search for any signs of life in places where human rescuers can't go.
The robot is equipped with a camera that can work in the dark, as well as a detector that not only finds people, but can also detect poisonous gas.
Another use for the rescuers is the supply bot, with its 10metrelong pipe. People trapped in the ruins will be able to get supplies including oxygen and liquids.
Experts have said that the robots will be produced, and serve as part of the national earthquake rescue team as soon as next year.
1. We can learn from the passage that the earthquake rescue robot ________.| A．is unable to deliver goods | B．is designed to predict the earthquake |
| C．can send pictures even at night | D．can be used to clear away poisonous gas |
| A．has a unique shape |
| B．has more functions |
| C．is equipped with more advanced cameras |
| D．can work by itself once given the information |
| A．a remote control | B．a detector |
| C．a long pipe | D．a helicopter |
| A．Some information about earthquakes. |
| B．How to build earthquake rescue robots. |
| C．An introduction to a kind of earthquake rescue robots. |
| D．Different earthquake rescue robots in the world. |
4 . After the season for giving, it is the one for throwing away. Each year in late December and early January a massive amount of plastic packaging is discarded (丢弃) worldwide. In Britain alone households generate 30% more waste, an extra 3m tonnes, in the month over Christmas. Most is destined for landfill. Lithuania will do less damage than many, though. The country now recycles at a record level. Almost three- quarters (74%) of plastic packaging waste was recycled there in 2017, the highest proportion in Europe.
Much of Lithuania' s success is due to a deposit refund scheme (方案). Customers pay €0.10 extra when buying drinks containers. After use, these can be fed into reverse vending machines (反向自动售货机) installed in shops, which spit the deposit back out. The machines’ contents are sent directly to recycling centers. By the end of 2017, 92% of all bottles and cans sold in Lithuania were being returned. The overall plastic packaging recycling rate increased by almost 20%.
The Lithuanian government says the scheme has fueled a potential love for recycling in its citizens. Nearly 90% of Lithuanians have used the machines at least once. However, Lithuanians do not generally describe themselves as eco-fighters. A 2017 survey by the European Commission found they were less likely than most other Europeans to regard environmental issues as “very important”.
The eagerness of Lithuanian recyclers may stem not from a love of the Earth but from a low net worth(资本净值). A tenth of the population live on less than €245 a month. In big cities it is common to see people scooping recyclable items out of bins to take to the machines.
Less litter and money for people who need it seems like a win-win. But it might not in fact be best for the environment in the long run. In Germany ----where a similar, widely used refund deposit scheme has been in place since 2003 --- the earnings from keeping the deposits from unreturned bottles seem to have discouraged producers from switching to more sustainable packaging.
1. What might most Lithuanian customers do under the deposit refund scheme?| A．They send their drinks containers directly to recycling centers. |
| B．They spend more on drinks than other European customers. |
| C．They return their used drinks containers. |
| D．They use vending machines to buy drinks. |
| A．Lithuania beat many countries in plastic recycling. |
| B．Lithuanians were less aware of environmental conservation. |
| C．Lithuanians made much money from recycling. |
| D．Lithuania had an unequal income distribution. |
| A．Positive. | B．Unfavorable. |
| C．Ambiguous. | D．Uninterested. |
| A．How and why Lithuanians recycle their trash. |
| B．How waste turns into treasure in Lithuania |
| C．Who are recycling plastic bottles in Lithuania |
| D．Where Lithuanians throw away their plastic packaging |
5 . Online Free Courses
English Grammar and Style
We’ll present materials that cover grammatical principles, word usage, writing style, sentence and paragraph structure and punctuation. We’ll challenge you with quizzes and writing activities that will give you strategies to enhance the quality of your writing, and invite you to participate in discussions and assess the work of your peers (同龄人).
Length: 8 weeks
Instructor: Roslyn Petelin from the University of Queensland
Academic Writing Made Easy
From structuring and organizing an academic text to avoiding common mistakes that can negatively affect your credibility, this course offers a guide for those who want to improve their writing. Each week is comprised of video lessons, followed by exercises and tasks of assessing your peers' work.
The course requires upper-intermediate (中高级) to advanced English.
Length: 6 weeks
Instructor: Heidi Minning from the Technical University of Munich
Preparing to Network in English
Networking in the business world is key to career success. But what is networking? And how do you do it in English? This course helps you understand the basics of networking and why it’s important. You’ll identify the key qualities you should focus on developing. Most importantly, you’ll grow and expand your business network and professional connections.
Length: 6 weeks
Instructor: Joel Ozretich from the University of Washington
Using Emails for Networking in English
In this course, you’ll learn important strategies for writing effective emails. You' II learn how to write messages for different audiences and understand when to be formal or direct. You' II also learn how your choice of words can change the way people view your message.
Length: 4 weeks
Instructor: Daphne Mackey from the University of Washington
1. What do the first two courses have in common?
| A．Both last for one and a half months. |
| B．Both involve some peer review tasks. |
| C．Both require upper-intermediate English. |
| D．Both are offered by the same university. |
| A．Roslyn Petelin. | B．Heidi Minning. |
| C．Joel Ozretich. | D．Daphne Mackey. |
| A．Improving email-writing skills. |
| B．Giving tips on academic writing. |
| C．Exploring grammatical principles. |
| D．Introducing the basics of networking. |
6 . How did the ancient Chinese keep food warm in winter?
Facilities like electric rice cookers, microwaves, and electric kettles, make it easy for people to keep food warm and enjoy a comfortable winter. So how did Chinese people in ancient times keep food warm in winter without these? In fact, ancient Chinese people used their own methods of heat preservation as early as the Shang and Zhou dynasties.
● “Wen Ding”, ancient rice cooker
One of the major functions of an electric rice cooker is to keep food warm. The “Wen Ding”, an ancient cooking container, served the same purpose, but instead of using electric energy, the ancient cooking container preserved heart by burning fuels like charcoal(木炭).
● “Ran Lu”, ancient small hot pot
The “Ran LU” is a small size cooking vessel(器皿) made of bronze, which can be divided into three parts. A charcoal stove forms the main structure, with a bottom tray to hold charcoal ashes, and a movable cup at the top. Some experts have concluded that the vessel’s structure suggests it may have been used as a small hot pot and that these vessels became popular in the Warring States Period(475—221 BC)
●“Bronze You”, ancient kettle
The Bronze You was one of the most common wine containers during the Shang and Zhou dynasties. The Bronze You can also be used to warm wine. For example, the Bronze You with beast mask design, unearthed in Jiangxi province, has an opening where charcoals could be placed. Just as people today can’t do without an electric kettle, the Bronze You allowed people to enjoy a hot drink.
●“Bronze Yan”, ancient steamer
Although the “Wen Ding” was effective at keeping food warm, the ancient Chinese people later found that its burning produced pollution. As a result, the “Bronze Yan ”was made with a two-tier structure and used to steam rice and other grains. After the Eastern Han Dynasty (AD 25-AD 220), further improvements to the“Bronze Yan” led to the modern-day steamer.
1. When did the “Ran Lu” become popular?| A．In the Zhou Dynasty. | B．In the Warring States Period. |
| C．In the Eastern Han dynasty. | D．In the Stone Age. |
| A．place charcoal | B．pour water | C．store wine | D．hold charcoal ashes |
| A．It is warm. | B．It is convenient. | C．It is environment-friendly. | D．It is useful. |
7 . Earthquake rescue robots experienced their final tests in Beijing. Their designers said with these robots, rescuers would be able to buy more time to save lives during an earthquake.
This kind of robot looking like a helicopter is a flying robot. It’s about 3 meters long, and it took about 4 years to develop the model. Its main functions (功能) are to collect information from the air, and send goods of up to 30 kilos to people trapped by an earthquake. It has a high-definition 360-degree panoramic (全景的) camera. It can work day and night and is also able to send the latest pictures from the quake area.
Dr Qi Juntong, a researcher at Chinese Academy of Sciences, said, “The most important feature of this flying robot is that it doesn’t need a distant control. We just set the destination information on it, and then it takes off, and lands by itself. It flies as high as 3, 000 meters, and as fast as 100 kilometers per hour.
This robot has a different function—it can change as the environment changes. Its main job is to search for any signs of life in places where human rescuers are unable to go. As well as a detector (探测器) that finds victims and detects poisonous gases, a camera is placed in the 3-metre-long robot, which can work in the dark. Another use for the rescuers is the supply bot. With its 10-metre-long pipe, people who are trapped in the ruins will be able to get supplies including oxygen and liquids.
Experts have said that the robots would enter production and serve as part of the national earthquake rescue team as soon as possible.
1. What does Dr Qi Juntong think makes this robot mainly different from the others?| A．It has more functions. | B．It has a unique shape. |
| C．It has more advanced cameras. | D．It can work by itself once given the information. |
| A．A camera. | B．A detector. | C．A rescuer. | D．A supply. |
| A．It is carried by the helicopter. | B．It weighs about 30 kilos. |
| C．It is a machine with a length of 10 meters. | D．It hasn’t been put into production so far. |
| A．What the robot looks like. | B．An introduction to a robot. |
| C．How the robot is made. | D．Information about earthquakes. |
8 . 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(目录) 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.
Catalog stores usually don't have many salespeople, so customers can’t expect to receive much help from them. 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 like this.
When shoppers go to a catalog store, 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.
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. |
| 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 |
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 |
9 . Here's this week's list of four open jobs throughout the local area. Whether you're unemployed and need a job or you are just sick of the one you have, Roswell Patch wants to help. We know new jobs can be hard to come by these days, which is why we will try to post a selection of jobs we’ve found in the area on the site each week.
Happy hunting!
Part-time Spanish Instructor-World Language Institute, Inc. -Roswell
World Language Institute, Inc. in Roswell is currently hiring a part-time, native-speaking Spanish instructor. Applicants must be able to pass a background check and drive a 15-passenger bus to pick up students from several schools, from 2 pm-6pm .Monday-Friday. The position pays $10 per hour. More information about the job is available online.
Experienced Servers-Chill's-Alpharetta
Chili's in Alpharetta is seeking experienced servers to add to its team. Qualifications will include being clean and neat and having great attitude and customer service skills. The pay is $2. 13, plus tips. Stop by the store to fill out an application. More information about this position is available online.
Registered Nurese-North Fulton Regional Hospital-Roswell
North Fulton Regional Hospital is looking for a RN/Registered Nurse to fill a 12-hour night shift. Applicants must be registered and previous hospital experience is preferred. More information about the position is available online.
Software Engineer-Controlscan-Alpharetta
Controlscan in Alpharetta is hiring a software engineer, Applicants should have five or more years of relevant experience, as well as advanced knowledge of computer technology. Pay is commensurate (相称) with experience. More information about the position can be found online.
1. World Language Institute, Inc. is looking for _________.| A．a school bus driver | B．a full-time teacher |
| C．a Spanish manager | D．a Spanish teacher |
| A．Jane, hired by North Fulton Regional Hospital. |
| B．John, hired by World Language Institute, Inc. |
| C．Robert, hired by ControlScan |
| D．Sally, hired by Chili's. |
| A．to introduce some forms of online entertainment |
| B．to introduce some information about Roswell Patch |
| C．to provide some information for those who need a job |
| D．to hunt for those who want to work for Rosewell |
10 . Several new films on ordinary people’s contributions were released in celebration of the 70th anniversary of the founding of the People’s Republic of China (PRC).
A kaleidoscope (万花筒) of heroes
Patriotism and realism reflected in My People, My Country are the top two elements that have won the audiences’ hearts. “In the seven stories in My People, My Country, the protagonists (主角) are no longer the main creators of history,” Zheng Yang, a teacher, said after watching the movie.
“We don’t want to simply sing praises of China’s achievements over the past 70 years; we want to show that all the achievements have been made thanks to the Chinese people’s efforts,” Chen Kaige, told People.com.cn in a video interview.
A miraculous escape
The Captain, directed by Andrew Lau, is based on a real incident.
On May 14, 2018, a Sichuan Airlines flight from Chongqing to Lhasa in southwest China’s Tibet Autonomous Region, made a miraculous escape when a cockpit window broke. It caused a sudden drop in the air pressure inside the aircraft, leading to the co-pilot almost being sucked out. He was saved by his seat belt. The temperature plunged to minus 40 degrees Celsius.
But against great odds, Captain Liu Chuanjian managed to land the plane and keep all 128 onboard safe. It was regarded as a miracle in civil aviation history.
Peak performance
The Climbers, is based on two expeditions (探险) by Chinese climbers to Mt. Qomolangma, the highest mountain in the world.
In 1960, three Chinese climbers, were the first to reach the summit from the dangerous northern side, becoming the first men to do so. However, the feat was not recognized internationally as the team failed to provide any evidence. To vindicate the Chinese climbers, a gigantic team of over 400 members was put together in 1975. During this expedition, nine climbers reached the top. The expedition also measured the height of the peak—8,848.13 meters.
1. What’s the common in the seven stories in My People, My Country?| A．They are all based on real incidents. |
| B．They are all about common people. |
| C．They are all about heroes in the history. |
| D．They are all about the founding of China. |
| A．Out of question. |
| B．Around the corner. |
| C．All of a sudden. |
| D．Through thick and thin. |
| A．People’s Heroes |
| B．The Great Escape |
| C．The New Expedition |
| D．People’s Expectation |
