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At home and at work, invisible radio waves from dozens of wireless networks are running through your space and body. It’s reasonable to worry about what effect all that wireless energy might have on your health.

But while the wireless equipment is becoming popular recently, the kind of radiation they produce has been carefully examined for decades, says John Moulder, a professor from the Medical College of Wisconsin. In 2013, Moulder wrote a report about the existing health research on Wi-Fi. Like your mobile phone, Wi-Fi routers(路由器)send and receive information using radio waves, he says.

The research on radio waves and human health goes back at least to the 1950s, when there were concerns about Navy servicemen being exposed(暴露)to powerful shipboard radar(雷达). “We have 50 or 60 years of research into the kind of radiation connected with Wi-Fi,” Moulder says.

Foster was Moulder’s partner on that 2013 report of Wi-Fi's health effects. He says that, based on our understanding of radio wave strengths and risks, world health organizations have set safety standards for all the equipment that gives off radio waves—from phones to microwaves.

But some experts have more concerns about the types of weak radiation our wireless equipment produces. “We have animal studies suggesting even low-level exposures to the kind of radio wave radiation connected with Wi-Fi could have various negative health effects,” says Joel Moskowitz, a professor from the University of California.

Earlier this year, an animal study found heavy exposures to cell phone radiation increased rats’ risks for some brain and heart problems. But many of these animal studies are “all over the place” in their design quality, Foster says. Animal research often does not translate to humans. Also, many of the experiments are quite worrying, for the levels of radiation that the tested animals received are far greater than what people suffer when using mobile phones or wireless networks.

Moskowitz doesn’t disagree with Moulder. But he says the amount of radio wave radiation people receive today is different, and this raises new concerns. When it comes to our long-term, increasing exposures to all our wireless equipment, “we’re flying blind,” he says.

Of course, trying to avoid radio wave exposure is more or less impossible if you live in modern society. Moskowitz advises keeping wireless equipment away from your body and turning off wireless networks when they’re not in use. While any health risks are yet to be proved, “I think trying to minimize exposure is the best advice at this point,” Moskowitz adds.

【小题1】What can be inferred from what John Moulder and Kenneth Foster say?
A.The study of Wi-Fi dates back to the 1950s.
B.There is no need to worry about the use of Wi-Fi.
C.People take risks when using phones and microwaves.
D.Navy servicemen near radar were in great danger.
【小题2】What does the underlined sentence in Paragraph 6 suggest?
A.Many studies on animals can be seen here and there.
B.The design quality of animal research is far from scientific.
C.The conditions set for animal studies are similar to those of humans.
D.Human beings suffer from stronger radiation than the tested animals.
【小题3】What’s Moskowitz’s attitude towards the use of wireless equipment?
A.Cautious.B.Uncaring.
C.Positive.D.Curious.
18-19高二·江苏·期中
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For some in China, the aim of travel is to create 15-second videos. It's not about where you've been. It's about where you're seen to have been.

Perched(坐落于)on cliffs above a river, Hongyadong is a stilt-house complex in mock-traditional(仿古的)style in the city of Chongqing. Its bars, restaurants and golden neon lights have been a popular draw since it was built in 2006. Last year the number of visitors surged, with the waiting time to get in being three hours. For a while Hongyadong became the biggest attraction in China after the Forbidden City. The main reason, it seemed, was Hongyadong's sudden popularity on a social-media app Douyin, which is used for sharing photographs and 15-second videos.

Instead of having fun, some people now go in great numbers to remote strawberry farms or Icelandic fjords(峡湾)to take photos to impress their friends on social media. In China, Douyin, launched in 2016, has 230m monthly active users. Unlike users of Instagram, who mainly browse feeds of pictures posted by people they follow, Douyin's fans commonly use the app to watch hot-trending videos posted by users they do not know under categories such as “food” and “scenic spots”.

Uploading a picture or video from a photogenic spot to sites such as Douyin and Kuaishou is known in China as daka, meaning “punching the card”. The word is also used to refer to the practice of registering your presence at a location that has already become hot. The aim is not to produce a well-crafted video or beautiful photograph, but simply to show that you have also been to the places that are popular.

A subculture has developed of young people who choose daka as a lifestyle. So-called daka zu-“daka tribes”-can be found roaming Chongqing and other cities, checking in at as many hot locations as possible within a single day. Guides can be found online, to show the most efficient ways to achieve this. Companies offer “daka tours”. Shops and restaurants in China try to make themselves as daka- friendly as possible: a coffee shop in Beijing built inside a shipping container, for example. Douyin users can use the app to create “daka videos”: super-speed slide shows of themselves at daka sites.

The daka craze may have practical origins (起源). China's young urban professionals have little vacation time. In their first year at a company, employees can expect at most five-day paid-vacation. So workers need to make the most of their limited leisure time. Douyin captures the mood with its slogan: “Make every second count.”

【小题1】What made Hongyadong the second biggest tourist attraction in China?
A.Its location and mock-traditional style.
B.The three-hour waiting time to access it.
C.Its bars, restaurants and golden neon lights.
D.Quite a few users sharing photos and videos of it on Douyin.
【小题2】What can we infer from the underlined sentence in Paragraph 3?
A.Icelandic fjords are the most famous travel destination on social media.
B.Strawberry farms are highly recommended on social media.
C.The purpose of travelling has been changed by social media.
D.Social media make it possible for users to have fun in remote areas.
【小题3】What most probably causes the increasing popularity of daka?
A.The desire for travel.
B.Limited leisure time.
C.Daka- friendly working places.
D.Free daka tours.
【小题4】What can be a suitable title for the text?
A.Are social media popular in China?
B.Is daka the aim of travel?
C.Hongyadong, a must-see spot
D.A slow-paced life, a better choice

To build a prosperous (繁荣的) society, a fundamental understanding of the modern economy as a driving force in today’s world is essential.

What kind of prosperity have we achieved so far? The widespread definition of prosperity focuses on economic power and growth as measures of success. Let’s take a look at history. The Second Industrial Revolution enabled mass production and created a sufficient supply of goods. This has greatly increased the importance of money in its role as “a store of value, ” and “a medium of exchange. ”As a result, we have pursued economic power as the only indicator of prosperity, such as GDP. Waves of globalization and technological evolution have promoted overall economic growth, but have allowed the few who are strong to achieve greater power while exploiting the many who are weak. Consequently, inequality has worsened, and disunity has intensified.

The path to a truly prosperous world requires a shift in focus towards the most suitable happiness for all, in addition to economic power. Defining happiness, however, is a complex task. What makes people happy? The degree to which the same thing creates happiness differs from person to person. Happiness is subjective and complicated. This is a world of “multiple values” where each of us determines worth as opposed to “one fixed price” based merely on an economic perspective. Individuals shouldn’t be defined by a single identity or role but by multidimensional nature as well as multiple roles making independent choices and taking actions for their happiness in different aspects.

Businesses must be pioneers in pursuing not only economic growth but also the happiness of all citizens of society. Companies can contribute through the pursuit of social value as well as economic profit. At the heart of this lies “purpose”. A company’s purpose defines the value it brings to society. The true worth of a company should be determined not just by the return s it creates for shareholders but by the value it creates for society as a whole.

【小题1】What is the author’s attitude to the widely accepted standard of prosperity?
A.Indifferent.B.Critical.C.Uncertain.D.Approving.
【小题2】What is the side effect of technological evolution?
A.The slower economic growth speed.
B.The sharp reduction of job opportunities.
C.The enlarged gap between the rich and the poor.
D.The increasing conflict between different nations.
【小题3】Which statement will the author agree with according to the passage?
A.Happiness is changeable and beyond control.
B.Happiness largely depends on economic power.
C.The pursuit of profit determines a company’s true worth.
D.A prosperous world should be measured by multiple values.
【小题4】Who are the main intended readers of the text?
A.Social psychologists.B.Enterprise administrators.
C.School educators.D.Technological researchers.

People who have children experience greater happiness and feel they find more meaning in life than those without kids , according to psychologist from the university of California and university of British Columbia and Stanford university. They also said that in spite of all kinds of pressure linked to parenthood, parents feel happier during the day hours when they are taking care of their kids than during other daily tasks. The report included three different studies , one from each university, and appeared in the journal psychological science .

The research was carried out in three stages, and in each of the parts psychologists interviewed about 190 people and asked them to describe how they felt during their daily activities which included cooking, changing diapers(尿布), doing the dishes, going to work and playing with the kids. The authors wanted to figure out whether people who had children felt happier and evaluated(评估)their lives more positively when compared to those without kids. They were also interested in whether parents experienced more positive feelings while taking care of their kids than when doing some other day -to -day activities .

According to Elizabeth Dunn, psychology professor at the University of British Columbia and a co-author of the study, the results were quite a surprise for the researchers. All the people who had children reported that caring for their young ones was more meaningful and made their lives much happier than any other activity did.

These findings challenge the common belief that children are linked to reduced well-being, researchers said. The impression many people have now from the mass media and academic research is that being a parent seems to be quite a negative experience. Many previous studies on this topic linked parenthood to unhappy marriages, lower life satisfaction and even depression, Elizabeth Dunn, who was expecting her first child, said. In Dunn's personal opinion, parenthood is related to, but may not cause, happiness.

The results showed that age and marital status(婚姻状况)also played a role in parental happiness. The study found that older and more mature married couples who have higher social status and do not have financial problems are more likely to be happier if they have kids when compared to childless couples. Even single parents said that all the stresses linked to parenthood did not completely wipe out the feelings of satisfaction caused by caring for kids. On the other hand, young parents who were under the age of 26 were found to be significantly unhappier than their peers who did not have children. Interestingly, fathers in the study were reported to be particularly satisfied and experience only positive feelings compared to men without kids.

Sonja Lyubomirsky, professor of psychology at UC Riverside and a leading scholar in positive psychology, said that their study does not necessarily mean that parenting makes people happy; however, there is a clear connection to be taken into consideration. And while more research is needed on the matter, the new findings suggest that the responsibilities and all the work that arrives with parenthood may be offset (抵消)by the pleasure of having children, and childcare may actually be linked to feelings of happiness and meaning in life.

【小题1】What does the passage mainly tell us?
A.What marriage and parenthood are.B.How marriage is linked to parenthood.
C.Whether parenthood is beneficial.D.Parenthood brings people more happiness .
【小题2】What can we know about the research from Paragraph 2?
1. The findings of the research       
2. The number of people involved in the research
3. The researchers’ expectation       
4. Where the research was carried out
A.1&3B.2&3C.2&4D.1&4
【小题3】What's Elizabeth Dunn's attitude towards parental happiness?
A.Uninterested.B.Curious.C.Cautious.D.Opposed.
【小题4】It can be inferred from the passage that ________.
A.the research about parental happiness wasn't totally convincing
B.marital status plays the most important role in parental happiness
C.fathers are more likely to feel happy about caring for a child than mothers
D.the younger parents have children, the happier they are

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