1. 阅读理解

    Before the 1830s, most newspapers were sold through annual subscriptions in America, usually $8 to $10 a year. Today $8 or $10 seems a small amount of money, but at that time these amounts were forbidding to most citizens. Accordingly, newspapers were read almost only by rich people in politics or the trades. In addition, most newspapers had little in them that would appeal to a mass audience. They were dull and visually forbidding. But the revolution that was taking place in the 1830s would change all that.

    The trend, then, was toward the "penny paper"-a term referring to papers made widely available to the public. It meant any inexpensive newspaper; perhaps more importantly it meant newspapers that could be bought in single copies on the street.

    This development did not take place overnight. It had been possible(but not easy)to buy single copies of newspapers before 1830,but this usually meant the reader had to go down to the printer's office to purchase a copy. Street sales were almost unknown. However, within a few years, street sales of newspapers would be commonplace in eastern cities. At first the price of single copies was seldom a penny-usually two or three cents was charged-and some of the older well-known papers charged five or six cents. But the phrase "penny paper" caught the public's fancy, and soon there would be papers that did indeed sell for only a penny.

    This new trend of newspapers for "the man on the street" did not begin well. Some of the early ventures(企业)were immediate failures. Publishers already in business, people who were owners of successful papers, had little desire to change the tradition. It took a few youthful and daring businessmen to get the ball rolling.

(1) Which of the following best describes newspapers in America before the 1830s? A. Academic. B. Unattractive. C. Inexpensive. D. Confidential.
(2) What did street sales mean to newspapers? A. They would be priced higher. B. They would disappear from cities. C. They could have more readers. D. They could regain public trust.
(3) Who were the newspapers of the new trend targeted at? A. Local politicians. B. Common people. C. Young publishers. D. Rich businessmen.
(4) What can we say about the birth of the penny paper? A. It was a difficult process. B. It was a temporary success. C. It was a robbery of the poor. D. It was a disaster for printers.
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1. 阅读理解

When you're bored, you might start playing with a ball or other objects. Such behavior is common in people. Other animals like it too—that's why a dog fetches a stick, or a cat bats at toys. Play is an enjoyable way to pass the time. A new study finds that it's not just mammals that like to play. Bumblebees(大黄蜂)do it too, making them the first insects known to play. 

In the study, Hiruni Samadi Galpayage Dona, an insect expert, did an experiment using 200 untrained bumblebees to see if they might play. Of those, 45 would be marked with a number when they emerged as adults. 

A pathway was set up from the bumblebees' nest to a feeding area. One side contained small wooden balls that rolled. The other side had the same number of balls, but they were stuck to the floor. Half balls on each side were colored balls. The rest were left unpainted. 

For three hours a day over 18 days, Galpayage Dona found bumblebees weren't so interested in the side where the balls didn't move, but they explored the side areas and interacted with the balls. Once they managed to roll a ball, they strongly preferred that side. They returned, climbing on the balls and rolling them around. She also found bumblebees preferred certain colors of balls. 

"There's something about the mobility that is more interesting for the bumblebees than just colored objects," Galpayage Dona says. In another experiment, she sometimes left the balls out overnight. "When I came in the next day, I would always find some bumblebees rolling the balls." As with mammals, the bumblebees who played the most were the younger ones. Their play tapered off as they got older. 

The scientists say it's not clear why the bumblebees roll the balls or whether they enjoy it. But the experiment raises important questions about how the insects' minds work and whether they have feelings. 

(1)  How does the author introduce the topic?  A. By describing the fun of play. B. By analyzing reasons for boredom. C. By introducing similar phenomena. D. By presenting animals' cute images.
(2) What did the researcher do in the experiment?  A. She trained bumblebees to play balls. B. She put small balls along the pathway. C. She set up a pathway in bumblebees' nest. D. She rewarded the bumblebees with rolled balls.
(3) What does the underlined part "tapered off" probably mean in paragraph 5?  A. Mattered. B. Helped. C. Decreased. D. Emerged.
(4) What can be the best title for the text?  A. Bumblebees Prefer Shape to Color B. Balls Are Bumblebees' Favorite Toys C. Playing with Objects Is Animals' Second Nature D. Bumblebees Are the First Insects Known to Play
阅读理解 普通
2. 阅读理解

Lately, it's felt like technological change has entered an incredible speed. Companies like OpenAI and Google have unveiled new Artificial Intelligence systems with incredible capabilities, making what once seemed like science fiction an everyday reality. It's an era that is raising big, existential questions for us all, about everything from the future of human existence to the future of human work.

"Things are changing so fast,"says Erik Brynjolfsson, a leading, technology-focused economist based at Stanford University. As he notes, this new wave of technological change looks like it could be pretty different. Unlike before, experienced and skilled workers benefited mostly from AI technology. In this new wave, it's the less experienced and less skilled workers who benefit the most."And that might be helpful in terms of closing some of the inequality that previous technologies actually promoted," Brynjolfsson says. So one benefit of intelligence machines is-maybe-they will improve the know-how and smarts of low performers, thereby reducing inequality.

But it's also possible that Al could lower the profit of the experienced, smart, or knowledgeable ones.AI could reduce inequality by bringing the bottom up, and it could also reduce inequality by bringing the top and middle down.

Of course, as Erik put, it's also possible that Al could end up increasing inequality even more. For one, it could make the Big AI companies, which own these powerful new systems, wildly rich. It could also empower business owners to replace more and more workers with intelligent machines. And it could kill jobs for all but the best of the best in various industries, who keep their jobs because maybe they're superstars or because maybe they have seniority.

The effects of AI, of course, are still very much being studied and these systems are evolving fast, so this is just an assumption. This machine intelligence could upend much of the previous thinking on which kinds of jobs will be affected by automation.

(1)  What do the underlined words "the know-how and smarts" mean in paragraph 2? A. Experience and intelligence. B. Skills and potential. C. Capacity and experience. D. Outlook and talents.
(2) Who will gain more in this new AI era? A. The senior with high rank. B. The inexperienced with low competence C. The learned with great credit. D. The poor with practical skills.
(3) Which statement will Erik probably agree with? A. The fast development of AI will promote the division of inequality. B. AI Giants will be the dominator in the future world of new AI systems. C. The best of all walks of life will survive the competition against AI systems. D. Lower rank workers with little knowledge are bound to be abandoned by employers.
(4) Which of the following is the best title for the text? A. The Fast Growth of the Artificial Intelligence B. The Influence of the AI Inequality C. The Impact of the Artificial Intelligence D. The Future of the AI Generation
阅读理解 困难
3. 阅读理解

This year researchers expect the world to snap(按快门)1.35 trillion photographs, or about 3.7 billion per day. All those pixels(像素)take up a lot of room if they are stored on personal computers or phones, which is one reason why many people store their images in the cloud. But unlike a hard on drive which can be encrypted(加密)to protect its data, cloud storage users have to trust that a tech platform will keep their private pictures safe. Now a team of Columbia University computer scientists has developed a tool to encrypt images stored on many popular cloud services while allowing authorized users to browse and display their photographs as usual. 

Malicious(恶意的)attempts to access or leak cloud-based photographs can expose personal information. In November 2019, for example, a bug in the popular photograph storage app Google Photos mistakenly shared some users' private videos with strangers. Security experts also worry about employees at cloud storage companies on purpose accessing users' images. 

So the Columbia researchers came up with a system called Easy Secure Photos(ESP), which they presented at a recent conference. "We wanted to see if we could make it possible to encrypt data while using existing services," says computer scientist Jason Nieh, one of the developers of ESP. "Everyone wants to stay with Google Photos and not have to register on a new encrypted-image cloud storage service." 

To overcome this problem, they created a tool that preserves blocks of pixels but moves them around to effectively hide the photograph. First, ESP's algorithm(算法)divides a photograph into three separate files, each one containing the image's red, green or blue color data. Then the system hides the pixel blocks around among these three files(allowing a block from the red file, for instance, to hide out in the green or blue ones). But the program does nothing within the pixel blocks, where all the image processing happens. As a result, the files remain unchanged images but end up looking like grainy black-and-white ones to anyone who accesses them without the decryption key. 

(1)  What's probably the main purpose for people to store images in the cloud?  A. To save storage room. B. To make photos beautiful. C. To try a new storage way. D. To keep their privacy safe.
(2)  Why might employees in cloud storage companies be distrusted by experts?  A. They sell users' passwords. B. They have invented new tools. C. They often let out personal information. D. They may steal a glance at users' images.
(3) What's the advantage of ESP?  A. It can provide clear images. B. It can decrease the upload time. C. It can classify images automatically. D. It can encrypt data on the original platform.
(4)  What does paragraph 4 mainly talk about?  A. Method of decryption. B. Image-processing technique. C. Separate files of images. D. Data analysis of colors.
阅读理解 困难