Land Art, sometimes referred to as Earth Art or Earthworks, is a form of art which involves using physical landscapes to create art, taking art out of the museum and into the outside world. Modern Land Art movement really got going in the 1960s when American artists began creating Land Art on a large scale. Today, works of modern Land Art can be seen all over the world, sometimes right alongside much older pieces of Land Art created by people who lived thousands of years ago.

    Land Art, which is not necessarily unchangeable, can take a number of forms. For examples, in 1970 Robert Smithson created the Spiral Jetty（螺旋状防波堤）, made of a collection of stones and mud, in the Great Salt Lake. The American artist made a large jetty in a spiral shape which sticks out into the waters of the lake.

    Reshaping the landscape is a common characteristic of Land Art, which can be created by moving parts around. People can also add things to the environment to create Land Art, like salt, which is added to the Spiral Jetty. It is possible to use plants. In all cases, Land Art is immovable.

    Land Art is designed to gradually form, change, and eventually decay（衰落）. That's one of the biggest differences between Land Art and most of the art one sees in the museums. Some works of art can exist only for a few hours or days. Others are exposed to rain and wind so that they develop and decay over time, which is part of the attractiveness in the eyes of the artists.

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    Captain America and Blackpanther were about to defend Earth from the criminal Thanos when Kevin Foley first noticed something was wrong. Foley, a 46-year old information-technology worker from Kyle, Texas, was heading into the theater to see Avengers: Infinity War when he realized he was having trouble breathing normally. The same symptom struck again during another movie the following night, but more severe this time. Once the cast on the second film rolled, Foley took action: he looked at his wristwatch. It was a bigger step than you might imagine, because Foley was wearing an Apple Watch equipped with medical sensors and experimental software to track basic functions of his heart. And the watch was worried. It had, according to the display, detected signs of an irregular heartbeat.

    Before long, Foley was in an emergency room, where doctors hooked him up to an ECG(心电图), which showed that he was in atrial fibrillation(心房颤动), an irregular heartbeat that can lead to blood clots(血栓), stroke and other potentially disastrous diseases. Foley spent the next few days in the hospital while doctors worked to return him to a normal heart rhythm eventually turning to a procedure called electrical cardioversion to shock his heart back to normal. Foley is doing fine now. But he believes that, if not for the warning on his watch, he might not have sought help in time. “I would have never known,” he says.

    Foley and his watch were part of an experiment run by Apple and Stanford's medical school. But beginning Dec. 6, anyone can get an on-the-fly heart checkup, assuming they've paid $399 or more for an Apple Watch. That's when Apple will launch a software update that turns its latest model, called the Series 4, into a personal ECG, thanks to an innovative new sensor. Though less complicated than hospital ECG machines, the watch version can still provide basic information and warnings of potential risks worthy of a closer look by a medical professional.

    For Apple, this new ECG-on-your-wrist is its biggest bet yet that personal technology will inevitably include personal health. Along with competitors, Apple has already offered fitness functions, such as apps to track the steps you've walked. But with the new ECG scan, Apple is moving straight into medical aspects of heath, a distinction underlined by the fact it sought and received Food and Drug Administration clearance for the clearance for the heart monitor.

    In many aspects, nowadays business environment has changed greatly since the late 1980s. The end of the cold war completely altered the very nature of the world's politics and economics. In just a few short years, globalization has started a variety of trends with profound consequences: the opening of markets, true global competition, widespread deregulation (解除政府对……的控制) of industry, and an abundance of accessible capital. we have experienced both the benefits and risks of a truly global economy, with both wall street and main street (平民百姓) feeling the pains of economic disorder half a world away.

    At the same time, we have fully entered the information age, starting breakthroughs in information technology, which have irreversibly altered the ability to conduct business unconstrained by the traditional limitations of time or space. Today, it's almost impossible to imagine a world without intranets, e-mail, and portable computers. With amazing speed, the internet is profoundly changing the way we work, shop, do business, and communicate.

    As a consequence, we have truly entered the post-industrial economy. We are rapidly shifting from an economy based on manufacturing and commodities to one that places the greatest value on information, services, support, and distribution. That shift, in turn, attaches great importance to "knowledge workers," a new class of wealthy, educated, and mobile people who view themselves as free agents in a seller's market.

Beyond the field of information technology, the increasing pace of technological change in virtually every industry has created entirely new business, wiped out others, and produced a great demand for continuous innovation (创新).New product, process, and distribution technologies provide powerful levers for creating competitive value. More companies are learning the importance of destructive technologies—innovations that hold the potential to make a product line, or even an entire business segment, virtually outdated.

    Another major trend has been the consumer and business markets. There's a growing appreciation that superficially similar groups of customers may have very different preferences in terms of what they want to buy and how they want to buy it. Now, new technology makes it easier, faster, and cheaper to identify and serve targeted micro-markets in ways that were physically impossible or prohibitively expensive in the past. Moreover, the trend feeds on itself, a business's ability to serve sub-markets fuels customers' appetites for more and more specialized offerings.

In a study of 33 years of trends in Body Mass Index (体重指数) across 200 countries, the scientists found that people worldwide are getting heavier {#blank#}1{#/blank#}that most of the rise is due to gains in BMI in rural areas. 

BMI is an internationally recognized measurement tool {#blank#}2{#/blank#}

gives an indication of whether someone is a healthy weight. It is calculated by dividing a {#blank#}3{#/blank#} (person) weight in kg by their height in metres squared, and a BMI of between 19 and 25{#blank#}4{#/blank#} (consider) healthy. 

The study found that between 1985 and 2017, average rural BMI increased {#blank#}5{#/blank#}2.1 in women and men. In cities, however, the gain {#blank#}6{#/blank#} (be)1.3 in women and 1.6 in men. The researchers described "striking changes" in the geography of BMI. In 1985, urban men and women in more than three quarters of the countries{#blank#}7{#/blank#} (study) had higher BMIs than men and women in rural areas. But 30 years later, the BMI difference between urban and rural people in many countries had narrowed {#blank#}8{#/blank#} (sharp). 

This may be due to some disadvantages for people {#blank#}9{#/blank#} (live) in the countryside, including {#blank#}10{#/blank#} (low) levels of income and education, higher costs of healthy foods, and fewer sports facilities. 

 The recent opening of a new exhibition building at the Sanxingdui Museum, in Guanghan, in Sichuan province, made the place {#blank#}1{#/blank#} instant tourist hot spot. The bronze heads, golden masks, holy trees and various statues reveal the {#blank#}2{#/blank#} ( mystery) faces of a culture dating back more than 3,000 years.

 For those who cannot make it to Guanghan, where the extensive site of Sanxingdui is located, an immersive exhibition equipped with digital technology, {#blank#}3{#/blank#} ( title) Hello Sanxingdui, {#blank#}4{#/blank#}( offer) an alternative means to be awed by the magnificence of this Bronze Age culture. It is running at the Longfu Art Museum in Beijing until Feb 29.

 It provides a time- travel experience for both an educational and artistic appeal. The journey begins {#blank#}5{#/blank#} a brief timeline of texts, photos and videos, showing how Sanxingdui was first discovered in the 1920s,{#blank#}6{#/blank#} objects were found by farmers digging an irrigation ditch(灌溉沟渠); and it highlights the important moments in the past century's continued archaeological efforts, to reveal the myths surrounding Sanxingdui and the secrets yet {#blank#}7{#/blank#} ( uncover).

 On show {#blank#}8{#/blank#} ( be) life- size reproduction s of dozens of astonishing artifacts, supervised by Sanxingdui Museum, such as 2.6- meter bronze statues, 3.8- meter- wide bronze masks and" the holy tree" standing nearly 4 meters.

 Images of these objects found at Sanxingdui and their {#blank#}9{#/blank#} ( pattern) have been digitalized, animated and projected on screens, leading the audience into the ancient kingdom of Shu, a {#blank#}10{#/blank#}( civilize) that thrived for centuries in the southwest during the Zhou Dynasty, and disappeared suddenly, leaving many myths and legends.