中关村,名家云集,国际品牌、高新技术、著名企业家、各界文人墨客,铸就了她“一览众山小”的气魄,一万多家高新技术企业,容纳着诸多统领最新科技的 IT 精英,在这样一个先进的“国度”里,却存在着一个不容忽视的问题——键康。黄灯——...中关村,名家云集,国际品牌、高新技术、著名企业家、各界文人墨客,铸就了她“一览众山小”的气魄,一万多家高新技术企业,容纳着诸多统领最新科技的 IT 精英,在这样一个先进的“国度”里,却存在着一个不容忽视的问题——键康。黄灯——中关村人普遍的生活状态提起中关村,很容易让人想起整日工作在电脑前的 IT 工作者,风华正茂的年纪,却头发少、眼圈黑、眼睛红、脸色差、倦容多,他们忘我的工作状态令人敬佩,但身体状况的确令人担忧。长期紧张忙碌的工作、不规律的生活、睡眠不足、运动量小,已成为中关村人习以为常的生活内容,浑然不觉自己早已处于远离健康的第三状态,离疾病仅一步之遥,甚至已进入疾病状态。展开更多
Recent geochemical and geophysical data from the Moon enable a revision of earlier interpretations regarding lunar origin, structure and bulk composition. Earth and Moon show many similarities among their isotopic com...Recent geochemical and geophysical data from the Moon enable a revision of earlier interpretations regarding lunar origin, structure and bulk composition. Earth and Moon show many similarities among their isotopic compositions, but they have evolved in totally dissimilar ways, probably related to the deficiency of water and volatile elements in the Moon as well as the vast differences in size and internal pressure. Some global geochemical differences from the Earth such as volatile depletion based on K/U ratios have been established. However, all current lunar samples come from differentiated regions, making the establishment of a bulk composition more reliant on bulk geophysical properties or isotopic similarities; it remains unclear how the latter arose or relate to whole Moon composition. The lack of fractionation effects among the refractory and super-refractory elements indicates that the proto-lunar material seems unlikely to have been vaporized while the presence of volatile elements may place lower limits on proto-lunar temperatures. The apparent lack of geochemical evidence of an impacting body enables other possible impactors, such as comets, to be considered. Although the origin of the Moon remains currently unknown, it is generally believed that the Moon originated as the result of a giant impact on the Earth.展开更多
文摘中关村,名家云集,国际品牌、高新技术、著名企业家、各界文人墨客,铸就了她“一览众山小”的气魄,一万多家高新技术企业,容纳着诸多统领最新科技的 IT 精英,在这样一个先进的“国度”里,却存在着一个不容忽视的问题——键康。黄灯——中关村人普遍的生活状态提起中关村,很容易让人想起整日工作在电脑前的 IT 工作者,风华正茂的年纪,却头发少、眼圈黑、眼睛红、脸色差、倦容多,他们忘我的工作状态令人敬佩,但身体状况的确令人担忧。长期紧张忙碌的工作、不规律的生活、睡眠不足、运动量小,已成为中关村人习以为常的生活内容,浑然不觉自己早已处于远离健康的第三状态,离疾病仅一步之遥,甚至已进入疾病状态。
文摘Recent geochemical and geophysical data from the Moon enable a revision of earlier interpretations regarding lunar origin, structure and bulk composition. Earth and Moon show many similarities among their isotopic compositions, but they have evolved in totally dissimilar ways, probably related to the deficiency of water and volatile elements in the Moon as well as the vast differences in size and internal pressure. Some global geochemical differences from the Earth such as volatile depletion based on K/U ratios have been established. However, all current lunar samples come from differentiated regions, making the establishment of a bulk composition more reliant on bulk geophysical properties or isotopic similarities; it remains unclear how the latter arose or relate to whole Moon composition. The lack of fractionation effects among the refractory and super-refractory elements indicates that the proto-lunar material seems unlikely to have been vaporized while the presence of volatile elements may place lower limits on proto-lunar temperatures. The apparent lack of geochemical evidence of an impacting body enables other possible impactors, such as comets, to be considered. Although the origin of the Moon remains currently unknown, it is generally believed that the Moon originated as the result of a giant impact on the Earth.
