According to analysts, an alliance between three major personal computer companies and most of the nation’s largest local telephone companies would enable customers to receive internet data over regular telephone lines with speeds much higher than is currently possible.

In no other historical sighting did Halley’s comet cause such a worldwide sensation as did its return in 1910-1911.

Rivaling the pyramids of Egypt or even the ancient cities of the Maya as an achievement, the army of terra-cotta warriors created to protect Qin Shi Huang, China’s first emperor, in his afterlife is more than 2,000 years old and took 700,000 artisans more than 36 years to complete.

Heirloom tomatoes, grown from seeds saved from the previous year, only look less appetizing than their round and red supermarket cousins, often green and striped, or have plenty of bumps and bruises, but are more flavorful.

Researchers in Germany have unearthed 400,000-year-old wooden spears from what it appears was an ancient lakeshore hunting ground as stunning evidence of human ancestors who systematically hunted big game much earlier than believed.

​【OG19-P150-28题】If the circumference of a circle inscribed in a square is 25π，what is the perimeter of the square ?

【OG19-P148-18题】During a recent storm ,9 neighborhoods  experienced power failures of durations 34,29,27,46,18,25,12,35,and 16 minutes ,respectively .For these 9 neighbor...

【OG19-P531-614题】Sammy: For my arthritis, I am going to try my aunts diet: large amounts of wheat germ and garlic. She was able to move more easily right after she started that dietPat:...

【OG19-P531-612题】Biologists with a predilection for theory have tried—and largely failed—to define what it is that makes something a living thing. Organisms take in energy- providin...

【OG19-P530-610题】Last year a record number of new manufacturing jobs were created. Will this year bring another record? Well, any new manufacturing Job is created either within an exist...

【OG19-P526-597题】A company has developed a new sensing device that, according to the company's claims, detects weak, ultralow-frequency electromagnetic signals associated with a bea...

【OG19-P525-593题】A prominent investor who holds a large stake in the Burton Tool Company has recently claimed that the company is mismanaged, citing as evidence the company’s failure ...

【OG19-P522-584题】Enforcement of local speed limits through police monitoring has proven unsuccessful in the town of Ardane.  In many nearby towns, speed humps(raised areas of pavem...

【OG19-P521-579题】Boreal owls range over a much larger area than do other owls of similar size. Scientists have hypothesized that it is scarcity of prey that leads the owls to range...

【OG19-P520-576题】Economist: Tropicorp, which constantly seeks profitable investment opportunities, has been buying and clearing sections of tropical forest for cattle ranching, although...