徐州怀孕期间检查(徐州四维彩超怀孕期要做几次) (今日更新中)

SAN FRANCISCO, June 14 (Xinhua) -- Google on Tuesday unveiled voice search for desktop computers and search-by-image, two new features allowing users to speak their search into the computer and search with the help of images.Speaking at the Internet search giant's Inside Search Event in San Francisco, Mike Cohen, head of Google's speech technology efforts, said its voice search is now available in 27 languages and dialects, an estimated coverage of around 5 billion people or two-thirds of world population.Voice search has already been available in Google's mobile search application from 2008. Adding the feature to desktops is part of Google's strategy to bring mobile innovations to its desktop search.The voice search on desktop performs similarly to voice search on smartphones -- users can click the microphone button and speak the query. It is only available via Google's Chrome browser for now.Cohen noted that the volume of Google mobile speech inputs has increased by six times in the last year.Also at the event, Google introduced search-by-image, which enables users to drag-and-drop, copy-and-paste image URL, or upload the image from the desktop into the search box. They can also use a Chrome or FireFox software extension to add images to the search.Google said the search-by-image feature will be available in most countries and regions over the next few days to Chrome users, noting that it will not collect and store any images that users use.

COPENHAGEN, June 7 (Xinhua) -- The outbreak of infections caused by E. coli bacteria may be over in Denmark as no new cases have been reported here since Friday.According to Denmark's National Serum Institute (NSI), there are 18 confirmed cases of severe intestinal infection caused by exposure to the bacteria as of Monday. No new infections have been reported since Friday, it added.The confirmed cases are said to consist of 10 men and 8 women aged between 23 and 81 years of age. Seven show symptoms of kidney failure which is associated with advanced stages of the infection.All but one are believed to have contracted the infection while traveling in northern Germany, where the outbreak started, the NSI said.So far, the E. coli infection has claimed 21 lives in Germany, which reports over 2,100 confirmed and suspected cases. It has also spread to 12 countries according to the World Health Organization (WHO)."This particular strain of E.coli has been identified in some people sporadically in the past, but it has not been known to have been associated with outbreaks in the past," a WHO spokesperson said Friday, adding it was a "very, very rare strain."Health authorities in Germany now suspect bean sprouts as the source of contamination in this outbreak, although this is yet to be confirmed.Dr Kaare Moelbak, an epidemiologist at NSI told Danish media Sunday that bean sprouts were a "very likely" source of contamination.Cucumbers were initially suspected and Denmark's food authority continues to warn against eating raw tomato, cucumber or lettuce from Germany until the source is established.Children are normally most vulnerable to E. coli infection but most of those infected in this outbreak are above the age of 20 years, Moelbak told Xinhua last week.He said children are likely less affected by this outbreak as they usually eat fewer salads than adults.In Germany, it is mostly women who have been affected by the infection. Moelbak explained the skew in infections saying women tend to choose to eat more vegetables than men, in comments made to Danish media Thursday.

HOHHOT, Aug. 27 (Xinhua) -- A 5,000-year old rock carving in north China's Inner Mongolia Autonomous Region depicts a falling meteor, said archaeologists on Saturday.A rock on the side of Dahei Mountain in the city of Chifeng has images of people, domed houses and a fire ball with a long tail falling from the sky engraved on it, said Wu Jiacai, head of the Inner Mongolia rock paintings protection association."I believe it shows prehistoric people returning at dusk from a hunting trip to their domed houses, as a meteor falls from the sky," Wu shared his findings at the 6th Hongshan Cultural Forum that runs from August 25 to 27.He added that in the same location several years ago, another set of carvings were found showing people fleeing, snakes slithering and birds flying away, which might be what happened after the meteor hit the earth.The area has about 1000 carvings all believed to be made by the Neolithic Hongshan people, Wu said."The pictures can shed some light on the disappearance of the Hongshan culture, which was quite developed," Wu said.

BEIJING, Sept. 14 (Xinhuanet) -- Scientists had discovered the fossils of a new species of ancient carnivorous fish, National Geographic reported Monday.The newly-found ancient fish, "Laccognathus embryi", is a 1.8-meter-long predator, which was "waiting to lunge out to grab whatever was in front of it," said study co-author Ted Daeschler, a vertebrate zoologist at the Academy of Natural Sciences in Philadelphia, the U.S..It had a jaw filled with sharp teeth that were 1.5 inches long, the Journal of Vertebrate Paleontology described.The fish lived in the Devonian period, 415 to 360 million years ago, which "was a fish-eats-fish kind of world," Daeschler said. "There was a real arms race going. If you didn't have good armor on your body, you were very vulnerable.""It's not just finding the animal - it's also placing the animal in its evolutionary crucible," Daeschler added.Its closest living relative is the lungfish which can survive in the drought, scientists said.Scientists hope the finding can help in their study on the revolution of fishes as well as other species.

BEIJING, July 26 (Xinhuanet) -- Hong Kong scientists announced that they had determined the idea of time travel is impossible by proving nothing can travel faster than the speed of light.The finding is contained in a study done by a research team from Hong Kong University of Science and Technology. The study was published Monday in a scientific journal "Physical Review Letters" in the United States."The study, which showed that single photons also obey the speed limit c, confirms Einstein's causality, that is, an effect cannot occur before its cause," the university said on its website."By showing that single photons cannot travel faster than the speed of light, our results bring a closure to the debate on the true speed of information carried by a single photon." said Professor Du Shengwang, who led the study.The possibility of time travel was raised 10 years ago when scientists discovered the optical pulses in some specific medium might propagate information in a faster-than-light speed."Our findings will also likely have potential applications by giving scientists a better picture on the transmission of quantum information." Du said.

来源：资阳报