郑州郑州近视激光哪家好(郑州郑州眼科医院排行榜) (今日更新中)

LOS ANGELES, April 17 (Xinhua) -- Global warming will melt all the ice in the Arctic Ocean every summer, raising earth temperatures even further, researchers at the University of California-Los Angeles (UCLA) warned.The findings, available online Sunday in the April issue of Earth and Planetary Science Letters, a leading journal in geoscience, were based on analysis of the fossilized remains of four-million-year-old mollusks, they said.Two novel geochemical techniques used to determine the temperature at which the mollusk shells were formed suggest that summertime Arctic temperatures during the early Pliocene epoch (3.5 million to 4 million years ago) may have been a staggering 18 to 28 degrees Fahrenheit warmer than today, the researchers said.And these ancient fossils, harvested from deep within the Arctic Circle, may have once lived in an environment in which the polar ice cap melted completely during the summer months, according to the researchers.Such balmy polar weather would certainly melt all the ice in the Arctic Ocean every summer, said Aradhna Tripani, an assistant professor at the UCLA's departments of Earth and space sciences."Our data from the early Pliocene, when carbon dioxide levels remained close to modern levels for thousands of years, may indicate how warm the planet will eventually become if carbon dioxide levels are stabilized at the current value of 400 parts per million," she said.The earth's temperature was raised five to nine degrees Fahrenheit merely by the absence of year-round Arctic ice, according to Tripani.The results of the study lend support to assertions made by climate modelers that summertime sea ice may be eliminated in the next 50 to 100 years, which would have far-reaching consequences for Earth's climate, she said."The Intergovernmental Panel on Climate Change identifies the early Pliocene as the best geological analog for climate change in the 21st century and beyond," said Tripati. "The climate-modeling community hopes to use the early Pliocene as a benchmark for testing models used for forecasting future climate change."

BEIJING, Feb. 18 (Xinhua) -- Jia Qinglin, China's top political advisor, urged the municipality of Beijing to intensify efforts to promote the development of service and manufacturing industries.Jia, chairman of the National Committee of the Chinese People's Political Consultative Conference, made the remarks during his inspection tour in Beijing from Wednesday to Friday.During the tour, Jia visited factories, construction sites and communities to exchange views with officials and civilians. He also listened to a report from the Beijing municipal government.Beijing has taken the lead in optimizing its industrial structure as the output of its service industry accounts for 75 percent of the revenue from all sectors, according to official sources of the city.Jia encouraged Beijing to continue to promote its service sector by focusing on producer services and expanding the city's service businesses overseas.While visiting Beijing Benz Automotive Co., Ltd., Jia called for the strengthening of technological innovation in order to boost high-end equipment manufacturing.Beijing should turn itself into a center for national technological innovation to contribute to the country's economic development, Jia said.He also stressed the better protection of forest resources and the more efficient use of water to develop modern agriculture.

BEIJING, Feb. 27 (Xinhua) -- Chinese Premier Wen Jiabao said during an online chat with netizens here Sunday that the government is striving to ensure that the people live a comfortable life with security and confidence in the period of 2011-2015.China's development blueprint for the coming five years will place high emphasis on the efforts to improve the people's livelihood, Wen said.To enhance the people's living standards is "our work's starting point as well as the final aim," he said.Greater efforts will be made to boost social development and progress, especially in those key sectors and aspects concerning national development and mass interests, the premier said.Wen began his online chat with netizens at 9 a.m. Sunday jointly hosted by the central government website (www.gov.cn) and Xinhua News Agency website (www.news.cn).

GUIYANG, Jan. 23 (Xinhua) -- Migrant workers, or off-farm workers, in China should enjoy paid annual family-visit vacations as their urban counterparts, a political advisor in southwest China's Guizhou Province had said."Localities could legislate on the issue on a trail basis," said Yu Peixuan, a member of the Guizhou Provincial Committee of the Chinese People's Political Consultative Conference (CPPCC), made this proposal at the political advisory body's annual session held Jan. 16-22.If migrant workers took paid home leave every year, they would have more time to help their wives in rural homes do the heavy farm work and educate their children, said Yu. "Thus, family ties would be cemented."Statistics show that 47 million women remain at home in rural China when adult males go off to cities to earn their livings.These women played an important role in taking care of the elderly people and children in their rural homes, but they also face many practical difficulties, such as heavy farm work and dull daily life.One of the major factors affecting these women's quality of life was the lack of communications with their husbands, said Yu.Yu called on large enterprises to allow migrant workers to take paid home leave first to set an example for other enterprises.According to the present Labour Law, regular workers at government organs, institutions and state-owned enterprises are eligible for paid vacations of one month per year to visit separated spouses in different cities or regions.

XI'AN, March 31 (Xinhua) -- Archeologists in the northwestern Shaanxi Province confirmed Thursday, after weeks of lab work, that the bones they found in a bronze cooking vessel from a 2,400-year-old tomb belonged to a male dog under a year old.Altogether 37 bones were found in the cooking vessel, which was unearthed in November 2010 from a tomb near the Xianyang International Airport in the suburbs of Xi'an, said Liu Daiyun, a researcher with the Shaanxi Provincial Archeological Institute."When we opened the 20-cm tall cooking vessel, we were shocked to find bones and soup inside," said Liu.The bones and soup had all turned greenish, similar in color to the bronze container, he said.Cooking vessels were a typical offering Chinese once presented to their deceased ancestors, said Liu.The custom became prevalent around the Warring States Period (475 - 221 BC), the time Liu and his colleagues believed this dog stew was offered.Hu Songmei, a researcher who did most of the lab work to identify the bones, said they found the bones were "strikingly similar" to four complete sets of canine skeletons preserved at the institute's lab.The newly found bones, however, were smaller, indicating the dog was just a pup, said Hu.Hu said further lab work was needed to tell the exact species of the canine. "Dogs were domesticated by humans at least 10,000 years ago, but the early dog species that evolved from wild wolves could be very different from today's pet dogs."Besides the dog bones, experts also found a wine-like liquid in another airtight kitchen ware from the same tomb. "Whoever the tomb owner was, he must have loved liquor and meat, so his sons wished he could still enjoy the feast in his grave."

来源：资阳报