1. What is wrong with the man ?
A.He gets allergic. | B.He has a stomachache. | C.He cut himself accidentally. |
A.A volleyball fan. | B.A volleyball player. | C.A volleyball coach. |
A.Using the Internet. | B.Writing a book. | C.Shooting a movie. |
3 . Greying Population Stays in the Pink
Elderly people are growing healthier, happier and more independent, say American scientists.
In the last 14 years, data have been gathered on the health and lifestyles of more than 20,000 people over 65. Researchers say high blood pressure and circulation problems and other diseases of old age are troubling a smaller proportion every year.
One interesting fact is that better-educated people are likely to live longer. For example, 65-year-old women with fewer than eight years of schooling are expected, on average, to live to 82. Those who continued their education live an extra seven years.
The survey also assessed how independent people over 65 were, and again found a striking trend. Their self-reliance is probably linked to an increasing use of home medical aids, such as raised toilet seats and bath seats.
A.But independence can have drawbacks. |
B.It is not surprising we see some effects. |
C.If the trends apparent in the United States continues, |
D.These developments also bring some health benefits. |
E.Clearly, certain diseases can be prevented or cured because of medical advances. |
F.And the rate at which these diseases are declining continues to increase. |
G.Researchers say it is because educated people seek more medical attention. |
4 . Facial recognition is a new technology built into all sorts of applications. It's also one of the more controversial technologies pioneered today, as it sets up deep questions regarding security versus privacy rights, and how these facial recognition applications can be safely and fairly applied.
Modern facial recognition is clearly dependent on specific technologies and algorithms (算法) that we've built during the machine learning and artificial intelligence era of the early 21st century. Specifically, most cutting-edge facial recognition programs feature a type of neural network called a convolutional (卷积) neural network (CNN). The system uses convolutions as well as other algorithm work in successive stages to do complex analysis of an image, and even identify people, animals, objects or settings through advanced analysis.
One primary piece of functionality in the CNN is feature detection. First, the face must be identified within the image context, so that the facial features can be analyzed. Methods such as the Viola-Jones are used to break down an image through color shift and local analysis of group pixels to find features like noses, ears, eyes, etc. The same facial recognition neural networks will often utilize ratios—such as the ratio from eyes to hairline, from ears to nose, or other stock facial ratios that can help with facial recognition. The image is then compared to all known faces to uniquely identify the identity of that person.
So, with all this winning technology the facial recognition engine can be surprisingly adept at learning how to recognize a particular individual’s face in a crowd. Facial recognition software is applied in payment processing to substitute cards with faces, for access and security purposes, and to identify criminals.
Primarily, companies that have used abundant public Internet images to pull together training sets for sophisticated facial recognition programs face blowback and resistance from some of their customers, including law enforcement departments, and from U.S. legislators, consumer advocates and citizens at large.
1. What are paragraphs 2 and 3 mainly about?A.How facial recognition works technically. |
B.How facial recognition is applied in society. |
C.When facial recognition gets increasingly significant. |
D.What the primary function of feature detection is. |
A.By comparing the image to all known faces. |
B.By learning how to recognize a particular face. |
C.By using convolutional neural network. |
D.By identifying face within context. |
A.Positive. | B.Negative. |
C.Ambiguous. | D.Indifferent. |
A.facial recognition is a new debatable world technology |
B.convolutional neural network is intended for feature detection |
C.facial recognition is mostly employed to identify criminals |
D.there’s still need for facial recognition to prove accuracy |
1. 介绍你推荐的一个活动;
2. 说明你推荐这个活动的理由。
注意:1. 词数 80 左右;
2. 开头和结尾已经给出;
3. 可以适当增加细节,以使行文连贯。
Dear Jim,
How’s everything going?
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours,
LiHua
The trade routes are of great importance. In march, the Suez Canal, one of the world's most important sea trade routes,
In early history, The Silk Road was the most important trade route,
Though the Silk Road was mainly a trading route, it was
7 . Introduction to Sanxingdui Museum
Situated in the northeast of the state-protected Sanxingdui Site by the bank of the Yazi River in Guanghan — a city famed for its long history and splendid culture, Sanxingdui Museum is a modern theme museum which is 40 kilometers to the north of Chengdu.
Covering a total area of 530 yields, Sanxingdui Museum had its foundation laid in August 1992, and opened to the public in October 1997. Featured for its relics, architecture, demonstration and gardens, the museum has become a place of cultural and tourist attractions enjoying prestige both at home and abroad and one of the three exquisite spots Sichuan has offered to the world tourism.
Notice to Sanxingdui Site Museum Travelers
Ⅰ. Opening & Booking Time
Opening time: Gallery One 8:30-18:00 Gallery Two 8:30-18:30
Booking time: 8:30-17:00
Ⅱ. Visiting Route
Gallery One→Gallery Two
Ⅲ . Ticket Price
(1) Gallery ticket ¥72 ¥36 (students)
(2) Garden ticket ¥5
The ticket is used on the sold day and each gallery once.
Admission free for children under 1.2 meters (including 1.2m), seniors aged 60 or above and the disabled.
Ⅴ. Guide Service&Price
(1) Guide Service
If you need a museum guide, please employ one at the reception desk in Gallery One.
Chinese, Cantonese, Tibetan: ¥80 (Group below 20 persons)
English, Japanese: ¥120 (Group below 20 persons)
(2) Guide Range: Gallery 1 & Gallery 2
(3) It takes about 80 minutes each guide service.
(4) We provide Chinese & English auto guiding device free of charge. Please deposit CNY ¥200 and your valid credential. If damaged or lost, you should compensate according to the cost price.
Ⅳ.Consulting telephone: 0838-5651526
Ⅵ. Complaint against the price telephone: 12358
1. What can we learn about Sanxingdui Museum?A.It’s located in the northeast of Chengdu. |
B.It’s an ancient theme museum. |
C.It’s a famous place of cultural and tourist attractions. |
D.It’s the only top tourist spots in Sichuan. |
A.¥154. | B.¥118. |
C.¥ 77. | D.¥ 41. |
A.pay CNY ¥200 for a museum guide |
B.first call the museum at 12358 for enquiry |
C.use Chinese & English auto guiding device for free |
D.deposit some money and provide her valid credential |
8 . China is determined to land its astronauts on the moon and set up a scientific station there,according to a project leader.
Zhou Yanfei,deputy chief designer of China's manned space program,said on Friday that China wishes to use the manned lunar missions to carry out scientific surveys and technology demonstrations,explore ways to develop lunar resources and strengthen the nation's space capabilities.
"A new wave of lunar explorations has been emerging in the world,with participants aiming to make sustainable missions to deepen knowledge of the moon and exploit resources there,"he said in a report delivered at the 2020 China Space Conference in Fuzhou,Fujian province."Unlike other nations,China must depend on its own science and technology to realize our goals."
The country is independently able to land its astronauts on the moon because it has the technologies,a group of well-trained,innovative professionals and high-efficiency research and management systems,Zhou said."However,our existing carrier rockets can't perform landing missions to the moon because they are not powerful enough.The Shenzhou- series manned spaceships are not suitable for lunar expeditions.We don't have a lunar landing capsule,"he said."Our ground support system was designed for operations in low-Earth orbit rather than on the lunar surface.
To solve the problem, we set out to produce a powerful launch vehicle. Zhou said researchers thought about two approaches-making a new heavy-lift rocket,or adjusting the next-generation rocket designed to carry astronauts,which is under development.Researchers prefer the latter approach because it would be easier to design and make and would become operational earlier.
The new rocket is being designed at the China Academy of Launch Vehicle Technology.Its main body will be 87 meters tall,with a diameter of 5 meters,which would make it almost twice as tall as the Long March 5,currently the biggest of China's rockets.
1. Which is NOT the goal of the manned lunar mission?A.To explore lunar resources. |
B.To perform scientific experiments. |
C.To set up a scientific station. |
D.To strengthen the national space power. |
A.China is not capable of pursuing the manned lunar program. |
B.There are still difficulties in pursuing the manned lunar program. |
C.There are a series of steps in the Manned Lunar program. |
D.It is manageable to carry out the Manned Lunar program. |
A.Nations must depend on themselves to explore the moon. |
B.The Long March 5 is the biggest of China's rocket. |
C.The newly-designed rocket will not carry astronauts. |
D.Producing a powerful launch vehicle is the most difficult part in the program. |
A.The new rocket is big enough to perform landing missions. |
B.The new rocket is being made to launch lunar spaceship. |
C.China's scientific power has improved. |
D.The new rocket will be put into use soon. |
9 . Exercise could not only benefit your body, but also improve your memory, researchers found recently. In their paper published on Monday, researchers from the University of California, Irvine in the United States and the University of Tsukuba in Japan introduced their experiment and conclusion.
Scientists invited 36 volunteers who were in their early 20s to do 10 minutes of light exercise before taking a memory test in which they were shown pictures like broccoli(西兰花)or picnic baskets and asked to recall them later. The same experiment was repeated with the same group of volunteers without exercising. u The memory task was really quite challenging , " said Michael Yassa,co-author of the study and a neuroscientist (神经科学家)at the University of California, Irvine. "We used very tricky similar items to see if they would remember whether it was this exact picnic basket versus (对抗)that picnic basket. "
Researchers also scanned brains of some, of the participants during the experiment. They found strengthened communication between regions involved in the storage and recollection of memories in brains of those who had exercised. This suggested that just 10 minutes of light exercise like walking,yoga or Tai Chi might increase memory power.
As all the volunteers in the experiment were relatively young, researchers are still working to look at the effects of light exercise on older people. "Our future goal is to try to develop an exercise prescription(处方) that can be used by older adults who might have disabilities or mobility impairments,but can still adopt very simple exercise rules of life and be able to,perhaps,delay cognitive decline temporarily," said Yassa.
1. What did the researchers find from the experiment mentioned in the text?A.Regular exercise is of benefit to the memory of all people. |
B.Just a short period of exercise better young people's memory power. |
C.Older people can also improve their cognitive power by exercising regularly. |
D.All the volunteers in the experiment improved their memory through exercise. |
A.The time to solve the questions was too limited. |
B.The people in the experiment were disabled. |
C.The items to be distinguished were extremely similar. |
D.The questions asked by the scientists were too complicated. |
A..To solve a problem. | B.To give practical advice. |
C.To present a research result. | D.To tell an interesting story. |
A.Advantages of Exercising Regularly |
B.Exercise Is Beneficial to Both Young and Old |
C.Exercise Can Improve Older People's Cognitive Power |
D.Ten Minutes of Exercise a Day Might Improve Memory |