1 . A newly published study shows that chess players perform objectively worse and — make more suboptimal (次最优的) moves when there is more fine particulate matter (颗粒物) in the air.
“We find that when individuals are exposed to higher levels of air pollution, they make more mistakes, and they make larger mistakes,” says Juan Palacios, a co-author of a newly published paper detailing the study’s findings.
Scholars have produced many studies exploring the effects of air pollution on cognition. The current study adds to that literature by analyzing the subject in a particularly controlled setting. The scholars used three web-connected sensors inside the tournament venue to measure carbon dioxide, PM2.5 concentrations, and temperature, all of which, can, be affected by external conditions, even in an indoor setting.
To evaluate the matter of performance of players, meanwhile, the scholars used software programs that assess each move made in each chess match, identify optimal decisions, and flag significant errors. During the tournaments, the researchers examined and ruled out alternate potential explanations for the dip in player performance, such as increased noise. They also found that carbon dioxide and temperature changes did not correspond to performance changes. Ultimately, the analysis confirms that the findings are driven by the direct exposure to air particles.
The researchers also found that when air pollution was worse, the chess, players performed even more poorly when under time constraints. The tourmament rules required that 40 moves had to be made within 110 minutes; for moves 31-40 in all, the matches, an air pollution, increase of 10 micro-grams per cubic meter led to an increased probability of error of 3.2 percent, with the magnitude of those errors increasing by 17.3 percent. And while the focus of this particular study is tightly focused on chess players, the findings have strong implications for high-skilled office workers.
1. What does the study find about air pollution?| A．It becomes more and more serious in the gym. |
| B．It can help evaluate chess players’ performance. |
| C．It may affect more people with mental processes. |
| D．It can’t be affected by indoor surroundings. |
| A．To measure carbon dioxide and temperature. |
| B．To assess the performance of players. |
| C．To help players make great moves. |
| D．To distinguish players’ errors in time. |
| A．Limit. | B．Freedom. | C．Consumption. | D．Measurement. |
| A．Various reasons for chess players’ mistakes. |
| B．A new research on chess players’ performance. |
| C．Scholars’ concern about chess players’ health. |
| D．The influence of air pollution on chess players. |
With the development of modern technology, people can stay
Once joining the WeChat, people can find more and more people start to add them
However, addiction to WeChat will rob people of the time that should otherwise
3 . Marian Bechtel sits at West Palm Beach’s Bar Louie counter by herself, quietly reading her e-book as she waits for her salad. What is she reading? None of your business! Lunch is Bechtel’s “me” time. And like more Americans, she’s not alone.
A new report found 46 percent of meals are eaten alone in America. More than half(53 percent) have breakfast alone and nearly half(46 percent) have lunch by themselves. Only at dinnertime are we eating together anymore, 74 percent, according to statistics from the report.
“I prefer to go out and be out. Alone, but together, you know?” Bechtel said, looking up from her book. Bechtel, who works in downtown West Palm Beach, has lunch with coworkers sometimes, but like many of us, too often works through lunch at her desk. A lunchtime escape allows her to keep a boss from tapping her on the shoulder. She returns to work feeling energized. “Today, I just wanted some time to myself,” she said.
Just two seats over, Andrew Mazoleny, a local videographer, is finishing his lunch at the bar. He likes that he can sit and check his phone in peace or chat up the barkeeper with whom he’s on a first-name basis if he wants to have a little interaction(交流). “I reflect on how my day’s gone and think about the rest of the week,” he said. “It’s a chance for self-reflection. You return to work recharged and with a plan.”
That freedom to choose is one reason more people like to eat alone. There was a time when people may have felt awkward about asking for a table for one, but those days are over. Now, we have our smartphones to keep us company at the table. “It doesn’t feel as alone as it may have before all the advances in technology,” said Laurie Demeritt, whose company provided the statistics for the report.
1. What are the statistics in paragraph 2 about?| A．Food variety. | B．Eating habits. |
| C．Table manners. | D．Restaurant service. |
| A．He makes videos for the bar. | B．He’s fond of the food at the bar. |
| C．He interviews customers at the bar. | D．He’s familiar with the barkeeper. |
| A．The trend of having meals alone. | B．The importance of self-reflection. |
| C．The stress from working overtime. | D．The advantage of wireless technology. |
4 . The Internet plays a big part in human life. We use it for work and pleasure. We use it to learn a new language. We find advice on it. We use it to connect with family and friends. We use it to stay in touch with events we care about. The list goes on and on.
Well, that train has left the station. This expression means there is no going back to an Internet-free life. But can using the Internet too much be bad for our health? It might be, researchers say. A new study finds that heavy Internet use may be connected to high blood pressure in an unlikely group: teenagers.
High blood pressure makes your heart and blood vessels work too hard. Over time, this extra pressure increases your risk of a heart attack. High blood pressure can also cause heart and kidney disease. It is also closely linked to a brain disease.
The Henry Ford Hospital in Detroit, Michigan did the study. 335 young people, from 14 to 17 years old , took part in it. 134 of the teens were described as “heavy Internet users.” And researchers found that out of these 134 teens,26 had high blood pressure. The researchers say the study is the first to connect heavy web use with high blood pressure. Other research has connected heavy Internet use with anxiety, depression and obesity.
The lead researcher is Andrea Cassidy Bushrow. She said, “Using the Internet is part of our daily life, but it shouldn’t ruin us.” Ms. Cassidy Bushrow adds that it is important for teens to take regular breaks from their computers or smartphones and do some kind of physical activity. She also suggests that parents limit their children’s use of the Internet to two hours a day, five days a week.
1. The expression “that train has left the station” in Para. 2 is used to show________.| A．the Internet develops rapidly | B．no one can escape from the Internet |
| C．the Internet can provide whatever we want | D．there is no going back to an Internet free life |
| A．Causes of high blood pressure. | B．The harm of high blood pressure. |
| C．The disadvantages of Internet use. | D．Ways to prevent high blood pressure. |
| A．teenagers shouldn’t use the Internet |
| B．the Internet will ruin human life in the future |
| C．smartphones are more harmful than computers |
| D．regular breaks are necessary when using the Internet |
| A．Heavy Internet users are mostly teenagers | B．How to prevent teenagers from the Internet |
| C．Too much Internet use may be bad for teenagers | D．Every coin has two sides—so does the Internet |
Recently, in an attempt to handle a “masculinity crisis (男性气质危机),” the Education Ministry
Some social media users expressed support for the proposal, with one writing, “It’s hard
CCTV, the state broadcaster, wrote on its Weibo account Saturday: “Education is not simply about cultivating ‘men’ and ‘women.’ It’s more important to develop a
While the Education Ministry’s new plan did not
6 . Qiao is a sixth grader at Yuhui Primary School.He is only 12 years old but has been smoking for three years.Liu,15，is a Junior 2 student at Chicheng No.2 Middle School.He began smoking four years ago.“Smoking is part of my life，” Liu said.Qiao and Liu are not those boys' real names.But their problem，smoking，is a very real problem.In many countries，smoking is becoming a bigger problem for young people.Most smokers start in their teens (years of a person's age from 13 to 19) or earlier.
A study of 8,000 Beijing students last May told us that smoking is a problem for many Chinese kids.More than 21% of middle school students and 6% of primary school pupils said they smoked.
“If young people start smoking early，they will probably get addicted to nicotine.And it will be very hard to give up later on，” said a professor.
Every year，about four million people die because of smoking.And if people keep smoking，that number will go up to about 10 million a year by 2030，the World Health Organization (WHO) says.So we have to learn and tell others about the dangers of smoking.
1. The sentence “Smoking is part of my life” in paragraph 1 probably means “________”．| A．I don't smoke very often |
| B．Smoking is very important to me |
| C．I don't smoke at all |
| D．I'm going to give up smoking |
| A．He will surely die early. | B．He cannot stop smoking. |
| C．It will be difficult for him to give up smoking. | D．He will become lazy soon. |
| A．smoking is a serious problem among Chinese students |
| B．there are more and more smokers in China |
| C．some student smokers have already been seriously addicted |
| D．most of smokers are young students |
| A．smoking is becoming a bigger problem for young people |
| B．many people die because of smoking every year |
| C．WHO asks young people to give up smoking |
| D．nicotine makes people addicted |
7 . In England, some food companies across the whole country have been told to carry out urgent (紧急的) tests on all beef products. Do you know why? That’s because some food companies used horse meat to make beef products.
There are some examples about the horse meat matter. In January, 2013, in a number of UK supermarkets, frozen hamburgers were found to havetracesof horse meat in them. Some frozen beef products made by food company FINDUS were found to contain horse meat. All of the beef products made by this company have been removed from sale.
The government said that there’s nothing to suggest any health risk from the products. Food minister David Heath said people should not throw away frozen meat products and carry on eating meat. The government will tell people not to eat meat if the meat is not safe.
Food safety has been an important matter all over the world. More and more countries plan to take some useful measures to ensure the safety of food.
1. In England, some food companies have been told to ________ urgently.| A．stop making beef products | B．test all their beef products |
| C．test all their products | D．remove all their products from sale |
| A．Horse meat | B．Beef |
| C．Fish | D．Chicken |
| A．描绘 | B．追踪 |
| C．痕迹 | D．探索 |
| A．Send them back to the food companies |
| B．Throw them away. |
| C．Never eat them |
| D．Go on eating them. |
| A．Horse meat out of products | B．the food safety |
| C．the test food | D．the food sale |
增加:在缺词处加一个漏字符号(/\),并在其下面写出该加的词。
删除: 把多余的词用斜线(\)划掉。
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Recently campus safety has become public concern since a series of violent attacks happened, which causes serious damage. It makes us aware of the fact that safety should always come firstly in our daily life.
In this case, we should take effective measure which can solve this problem. Firstly, our students should realize we must follow our school or traffic rules, and pay attention to food safety, because many incidents happen just because of we are too careless. Secondly, you should take training of security so that we can keep calm if faced with conflicts. Thirdly, our government and schools should provide surroundings that our students can be buried in studying.
As far as I am concerned, improving campus safety is very important that we all should try our best to make anyone on campus safe and sound.
In the age of the smart phone, there seems no reason to ask questions about: the weather forecast, a business’s phone number or directions, which can all be
This isn’t the first time that great changes
Try to be respectful no matter
According to the report, the picture of the earth in the year 2020 is not a
Food production will
| A．learning | B．project | C．notice | D．study |
| A．pleased | B．pleasant | C．safe | D．blue |
| A．dangerous | B．beautiful | C．crowded | D．terrible |
| A．no more than | B．as many as | C．as much as | D．as large as |
| A．developing | B．developed | C．big | D．mountainous |
| A．none | B．each | C．all | D．neither |
| A．insist | B．reduce | C．increase | D．continue |
| A．so | B．but | C．or | D．however |
| A．already | B．hardly | C．partly | D．never |
| A．wanted | B．lacked | C．found | D．expected |
| A．destroying | B．protecting | C．disturbing | D．interrupting |
| A．saved | B．lost | C．discovered | D．found |
| A．Air pollution | B．Water pollution | C．Some diseases | D．All farmland |
| A．animals | B．plants | C．forests | D．people |
| A．must be true | B．will come true | C．can't be true | D．may be wrong |
| A．happens | B．develops | C．exists | D．appears |
| A．settling | B．working out | C．answering | D．dealing |
| A．no | B．still | C．less | D．plenty of |
| A．about | B．in | C．out | D．for |
| A．working | B．suggesting | C．spending | D．waiting |
