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你认识兔子吗?对这个问题,很多人会不屑一顾,谁不知道兔子呀,但我的确一直不晓得家兔和野兔有何区别,也对兔子的英文为什么会有两个词而困惑,上学时间过大人,大人说:一样。 相似文献
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《小哥白尼(趣味科学画报)》2010,(3)
<正>1有一种叫铁桦树的树,奇硬无比,子弹射在这种树木上,就像射在钢板上一样。据说铁桦树的硬度比钢板还硬一倍!将它长时间放入水中浸泡,树干最中心的部分还能保持干燥——世界上最硬的树,你信吗? 相似文献
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Effects of the rare earth ions on bone resorbing function of rabbit mature osteoclasts<Emphasis Type="Italic">in vitro</Emphasis> 总被引:6,自引:0,他引:6
ZHANG Jinchao XU Shanjin WANG Kui & YU Shifeng . Department of Chemical Biology School of Pharmaceutical Sciences Peking University Beijing China . Department of Medical Chemistry College of Chemistry & Environmental Science Hebei University Baoding China . Department of Oral Pathology Stomatological Hospital Peking University Beijing China Correspondence should be addressed to Xu Shanjin 《科学通报(英文版)》2003,48(20):2170-2175
The osteoclast plays initiating and vanguard roles in the course of bone remodeling. The resorption and formation of bone is the basic clues of bone remodeling, which results from the mutual dependent functions of osteoclasts and osteoblasts. When the osteoclasts are activated, the bone resorption function is increased. The excess bone resorption leads to osteoporosis, characterized by formation of many hollows, lacunae and tunnels on the bone surface or in depth[1,2]. The differentiation, pro… 相似文献
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朱乐萍 《中国新技术新产品精选》2008,(8):162-163
随着退耕还林(草)、小流域治理、天然林保护、三北四期等重点工程在大面积实施,当地生态环境在短期内得到了有效改善,各种飞禽走兽日趋增多。但是,随之而来的野兔、中华鼢鼠泛滥,逐渐成为林业建设中不可忽视的生物灾害。 相似文献
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