![](https://img.xkw.com/dksih/QBM/2018/12/28/2106350402813952/2107107966992384/STEM/53dc670743e147068249ec6713948834.png?resizew=554)
The Father of 3D Printing
About twenty years ago, the surgeons at the Wilford Hull medical center working to separate a pair of conjoined(连体的) twins thought that only one would be able to walk after the operation. After a model of the girls’ bone structure was
At the time, he was working for a company that used UV light to put thin layers of plastic coats on tabletops and
After patenting the invention, he set up 3D Systems,
相似题推荐
A. incredibly | B. contract | C. approached | D. basis | E. essential | F. blankets |
G. professionally | H. granted | I. strikes | J. mutual | K. breakthroughs |
The Father of Cool
It is evening, near freezing. The city is practically empty. Fog
The young man’s name is Willis Haviland Carrier. On that foggy night in 1902, he hit upon the theory that became the
Carrier graduated from university as a mechanical engineer in June 1901. A month later, he began working for the Buffalo Forge Company, a firm that produced heating and exhaust systems
Early the following year, the printing company
By the early 1850s, two
Carrier’s partial solution involved circulating cold water and then balancing their temperature with the rate of air flow. It was at the Pittsburgh Railroad Station that the solution came to him. Few other inventors have had such an impact on modern life and yet remained so little-known. Air conditioning, in a sense, has become
A.lanes B.charged C.dramatically D.mostly E. estimated F.powered G.connectivity H.filters I.dependent J.advocates K.invasion |
E-Scooters
Over the past two years, electric scooters have become ever-present in many of Europe and America’s biggest cities. Britain is the last major western European country to hold out against the
As with a dock less(无桩) bike, scooters are fitted with GPS trackers and wireless
E-Scooters have the potential to solve some of the worlds biggest transport problems. Most cities are already dangerously polluted and heavily congested, and it is simply not an option to put more cars and taxis on the streets. Scooters are efficient; one kilowatt hour of energy carries a car
Scooters are clean, cheap, and they require little new infrastructure. For a country like car-
A. abandoned B. challenge C. colored D. demonstrate E. ensures F. initiatives G. innovation H. pilot I. purchased J. recycled K. tailors |
Lego: One Step Closer to Being Sustainable
The Lego Group is one step closer to reaching its goal of making all its products from sustainable materials by 2030.
The Danish toymaker revealed a prototype (雏形) brick made from
“The biggest
It will be “some time” before bricks made from used materials can be
“Experimentation and failing is an important part of learning and
The move follows last year’s announcement that the company was making a $400 million investment over three years into sustainability
A. accounts B. echoes C. fearlessly D. tackling E. operated F. mastery G. particularly H. character I. informers J. striking K. unrivalled |
He fascinated Victorian England with his
But this detective was not Sherlock Holmes but a real life investigator, Jerome Caminada, who, as a new research suggests, helped inspire Sir Arthur Conan Doyle’s celebrated hero.
A biography of Caminada reveals a series of
The son of an Italian father and Irish mother, Caminada was based in Manchester, but was involved in cases which took him across the country, and he enjoyed a nationwide profile in the press, where
A. vision B. sure C. serve D. regard E. transformers F. worthy G. question H. claim I. magnetic J. charm K. mere |
Like many of my generation. I have a weakness for hero worship. At some point, however, we all begin to
Despite immense differences in cultures, heroes around the world generally share a number of characteristics that instruct and inspire people.
A hero does something worth talking about. A hero has a story of adventure to tell and a community who will listen. But a hero goes beyond
Heroes serve powers or principles larger than themselves. Like high-voltage (高电压)
The hero lives a life
Madonna and Michael Jackson are famous, but who would
Heroes are catalysts (催化剂) for change. They have a
![](https://img.xkw.com/dksih/QBM/2019/3/14/2160489668042752/2162506641211392/STEM/02c270ae6ebb42c189da2ffbcffd9657.png?resizew=554)
The Smithsonian’s National Portrait Gallery was preparing the wall text in 2014 to accompany an image of the boxer Mayweather Jr. During the process, the Washington museum decided to note that Mr. Mayweather had been“charged with domestic violence on several occasions,”receiving“punishments ranging from community service to jail time.”
Such context is common for
Now, museums around the world are
The
It is a provocative(引起争论的)moment for the art world, as the public debate about
“We’re very used to having to defend people in the collection, but it’s always been for the sitter”rather than the artist, said Kim Sajet, director of the Portrait Gallery, which has a large body of Mr. Close’s work.“Now we have to think to ourselves,‘Do we need to do that about Chuck Close?’”
“You can’t talk about portraiture in America without talking about Chuck Close,”she added.“There are lots of amazing artists who have been less than admirable people.”
Whatever museums