烟台168cm成人头骨左半边肌肉着色右半边骨性色分模型带颈部肌肉模型长春医学多媒体辅助教学系统,黑龙江蝶骨放大模型,兰州单直根密胺脂牙,西安心肺复苏模拟人（全身）,浙江21公分肌肉人模型,江西智能型网络多媒体儿童胸腹部检查教学系统(学生机),脑干放大模型厂家直销

BEIJING, Oct. 11 (Xinhuanet) -- Scientists have discovered that blind optimism is related to brain's frontal lobes which are associated with processing errors, according to a British study published Monday in the journal Nature Neuroscience.Scientists at the University College of London scanned brains of volunteers who were asked to estimate their personal likelihood of involving in negative events, like a divorce or cancer,  before and after given the average probability of these events occurring.They found that the volunteers who estimated lower probability (or the more optimistic ones) than the given one raised their estimates a little bit later while those estimated higher probability altered their estimates much more.Through the brain scanner, scientists saw there was less activity in the volunteers' frontal regions when the information given was worse than expected while more activity when the information was better than expected. It suggested that the more optimistic people neglected the negative predictions."The more optimistic we are, the less likely we are to be influenced by negative information about the future," said Dr. Tali Sharot, lead author of the study. He added being optimistic clearly had some benefits, "but it can also mean that we are less likely to take precautionary action, such as practising safe sex or saving for retirement. So why don't we learn from cautionary information?"

CHANGCHUN, Nov. 13 (Xinhua) -- An infrared camera set up by the World Wildlife Fund (WWF) and forestry authorities in northeast China's Jilin province has captured images of a wild Siberian tiger in the Wanda Mountains.Zhu Jiang, head of the WWF Northeast China Program Office, said Saturday that the photos, taken earlier this month, are the first images of a wild Siberian tiger taken in the mountainous area.He said the evidence consolidates the mountains' role as an important habitat for the endangered species, and reinforces the need for local authorities to tighten protection measures, especially clearing animal traps and improving animal rescue efforts.The agency estimates that there are fewer than 20 wild Siberian tigers remaining in China. They live in mountains in the northeastern Heilongjiang and Jilin provinces.Zhu said animal traps still pose a major threat to the safety of wild Siberian tigers and their prey.A wild Siberian tiger was found dead with a trap around its neck in the city of Mishan, Heilongjiang, in October.A WWF survey found an average of 1.6 traps for every 10 km of distance covered in the Siberian tiger nature reserves in Heilongjiang and Jilin last winter."The WWF hopes to cooperate with local governments to protect Siberian tigers and restore their habitats," Zhu told Xinhua. "We aim to help double the population of wild Siberian tigers in China by 2022, the next Year of the Tiger," he said.

NANJING, Dec. 8 (Xinhua) -- Chinese stargazers will have their best view of a total lunar eclipse in 10 years on Saturday if weather permits, the Zijinshan Astronomical Observatory under the Chinese Academy of Sciences (CAS) said Thursday.Wang Sichao, a research fellow with the observatory, said during the total eclipse, the full moon will not completely disappear from the Earth's shadow, but will take on a brilliant bronze color.He said the eclipse will be the best one seen in China since the last one occurred on Jan. 10, 2001."Theoretically, viewers can observe the eclipse from nearly everywhere in the country on Saturday," said the astronomer.He said the eclipse, the second this year, will last for 51 minutes. It will start at 8:45 p.m. and reach its climax at 10:06 p.m.Wang said Chinese viewers will have to wait until Oct. 8, 2014 to see the next total lunar eclipse.

HONOLULU, the United States, Nov. 12 (Xinhua) -- Chinese Commerce Minister Chen Deming has said that China-ASEAN Free Trade Area, launched at the beginning of last year, accords with the mutual interests of China and ten nations of the Association of Southeast Asian Nations (ASEAN) and brings advantage to both sides.Chen made the remarks during his meetings with Indonesian Trade Minister Gita Wirijawan and Thai Deputy Prime Minister and Commerce Minister Kittirat Na Ranong on Friday on the sidelines of the week-long Asia-Pacific Economic Cooperation (APEC) meetings held in Honolulu, Hawaii.According to information made available to Xinhua Saturday, Chen said in his meeting with Gita that China and Indonesia have witnessed a sound development of bilateral economic and trade relations. The China-ASEAN Free Trade Area has provided a new platform for the bilateral economic and trade cooperation, with more benefits and opportunities for enterprises from both countries.Chinese enterprises, especially those from the southern part of China, are keen to invest in Indonesia, said Chen, adding that China would like to discuss with Indonesia on creating areas similar to industrial parks so as to attract more Chinese enterprises and enterprises from other countries to invest in the Southeast Asian country.Gita said Indonesia will commit to the consensus reached between leaders of both countries to increase the volume of bilateral trade from current 34 billion U.S. dollars to 80 billion U.S. dollars in three or four years.He welcomed Chinese enterprises to invest in Indonesia, adding it will be conducive to the realization of the trade goal.Saying that the economies of Indonesia and China have been complimentary to each other, Gita expressed the will of comprehensive and long-term cooperation between both sides.During his meeting with Kittirat, Chen first expressed sympathy to the flood victims in the country, saying that China would like to offer assistance to the rescue and reconstruction efforts and strengthen cooperation in areas including infrastructure construction with Thailand.He said China and ASEAN nations should promote the substantial cooperation among member nations of the China-ASEAN free trade area, the largest free trade area in the world, improve infrastructure including highways, railroads, ports, telecommunication and electricity, so as to benefit the enterprises and people in the regions.China encourages enterprises to invest in the ASEAN nations and would like to conduct cooperation with enterprises from Thailand and other countries, Chen added.Kittirat, expressing his gratitude to China's help to the flood disaster, said that Thailand attaches great importance to the China-ASEAN Free Trade Area.Noting that Chinese enterprises are well-experienced in the construction of highways, railroads and bridges, he said Thailand welcomes Chinese enterprises to participate the construction and investment projects in these areas.