很少有实用程序象Nico MakComputing公司的WinZip和CanyonSoftware公司的Drag And Zip那样一年又一年地、针锋相对地竞争。在最近几个月,这场角逐又从传统的基于PC的文档格式(主要是.ZIP)扩展到了Internet网上常见的几种格式。NicoMak...很少有实用程序象Nico MakComputing公司的WinZip和CanyonSoftware公司的Drag And Zip那样一年又一年地、针锋相对地竞争。在最近几个月,这场角逐又从传统的基于PC的文档格式(主要是.ZIP)扩展到了Internet网上常见的几种格式。NicoMak凭借其29美元的WinZip 5.6在Internet领域中成为这场文档角逐中的佼佼者。 WinZip5.展开更多
Microsoft Windows 犹如一把双刃宝剑:既可帮你斩除一些麻烦又招致一些困扰。同时,Windows 对于中断冲突和系统整体性能细调爱莫能助。Windows 95即将出台,下面的实用软件(一些是新产品,一些是升级产品)可作为 Windows 维护和修理的工具...Microsoft Windows 犹如一把双刃宝剑:既可帮你斩除一些麻烦又招致一些困扰。同时,Windows 对于中断冲突和系统整体性能细调爱莫能助。Windows 95即将出台,下面的实用软件(一些是新产品,一些是升级产品)可作为 Windows 维护和修理的工具。TOUCHSTONE WINCHECKITTouchStone Software 售价79.95美元的 WINChecklt 2.0是一个综合性产品,可分析系统性能。展开更多
Inset公司99美元的HiJaak Graphics Suite for Windows 3.0超越了竞争者,它提供了一个光栅和向量图形完整的工作平台、一个输入图像至Windows应用程序的方便载体以及恰到好处的多媒体起步支持。 灵活的安装 HiJaak由五个模块构成,同时...Inset公司99美元的HiJaak Graphics Suite for Windows 3.0超越了竞争者,它提供了一个光栅和向量图形完整的工作平台、一个输入图像至Windows应用程序的方便载体以及恰到好处的多媒体起步支持。 灵活的安装 HiJaak由五个模块构成,同时通过软盘和光盘发行,后者允许临时用户直接从该CD-ROM上运行HiJaak,以性能代价换取硬盘空间。展开更多
过去,如果你要在PC和Macintosh之间转换文件,只有两种选择:用DOS系统将PC软盘驱动器设置为虚拟Macintosh驱动器;或者,应用一个同时能读写Mac磁盘的Microsoft Windows应用程序。DataViz公司开发的Corversions Plus V2.5($149)能使文件在P...过去,如果你要在PC和Macintosh之间转换文件,只有两种选择:用DOS系统将PC软盘驱动器设置为虚拟Macintosh驱动器;或者,应用一个同时能读写Mac磁盘的Microsoft Windows应用程序。DataViz公司开发的Corversions Plus V2.5($149)能使文件在PC和Mac两种机器间进行精确的转换。展开更多
Hunter-gatherer populations in greater northeast Asia experienced dramatic range expansions during the early Upper Paleolithic (45—22 ka) and the late Upper Paleolithic (18—10 ka), both of which led to intensive occ...Hunter-gatherer populations in greater northeast Asia experienced dramatic range expansions during the early Upper Paleolithic (45—22 ka) and the late Upper Paleolithic (18—10 ka), both of which led to intensive occupations of cold desert environments including the Mongolian Gobi and northwest China. Range contractions under the cold, arid extremes of the Last Glacial Maximum (LGM, 22—18 ka) may have entailed widespread population extirpations. The high elevation Qinghai-Tibetan Plateau is significantly more extreme in both climate and environment than either the Gobi or the Siberian taiga forests, and provides an ideal setting to test fundamental models of human biogeog- raphy in the context of regional population fluctuations. The area is presently occupied primarily by nomadic pastoralists, but it is clear that these complex middle Holocene (<6 ka) economic adaptations were not a necessary prerequisite for successful colonization of the high elevation Plateau. Exploratory field-work in 2000—2001 has established that Upper Paleolithic hunter-gatherers were present on the Qinghai-Tibetan Plateau by at least 12 ka and possibly much earlier. A speculative model for the colonization process is developed and preliminary archaeological data in support of the model are presented.展开更多
Rich paleoanthropological materials were unearthed in primary context from the Xinglongdong Cave in Fengjie County, Chongqing, South China, including a human tooth, numerous mammalian fossils, some stone artifacts and...Rich paleoanthropological materials were unearthed in primary context from the Xinglongdong Cave in Fengjie County, Chongqing, South China, including a human tooth, numerous mammalian fossils, some stone artifacts and a Stegodon tusk exhibiting intentional engravings.Based on biostratigraphic data and uranium series dating,the cave was utilized as a human shelter about 120000-150000 years ago. It is the first time that an archaic Homo sapiens fossil has been unearthed from the Three Gorges Region. Engravings on the Stegodon tusk appear in groups,making up simple and abstract images. It is the earliest known engravings created by human beings; it exhibits great potential for the study of the origin of art and the development of ancient cultures in south China and bears important implications for the origin of modern humans in East Asia.展开更多
文摘Inset公司99美元的HiJaak Graphics Suite for Windows 3.0超越了竞争者,它提供了一个光栅和向量图形完整的工作平台、一个输入图像至Windows应用程序的方便载体以及恰到好处的多媒体起步支持。 灵活的安装 HiJaak由五个模块构成,同时通过软盘和光盘发行,后者允许临时用户直接从该CD-ROM上运行HiJaak,以性能代价换取硬盘空间。
文摘过去,如果你要在PC和Macintosh之间转换文件,只有两种选择:用DOS系统将PC软盘驱动器设置为虚拟Macintosh驱动器;或者,应用一个同时能读写Mac磁盘的Microsoft Windows应用程序。DataViz公司开发的Corversions Plus V2.5($149)能使文件在PC和Mac两种机器间进行精确的转换。
文摘Hunter-gatherer populations in greater northeast Asia experienced dramatic range expansions during the early Upper Paleolithic (45—22 ka) and the late Upper Paleolithic (18—10 ka), both of which led to intensive occupations of cold desert environments including the Mongolian Gobi and northwest China. Range contractions under the cold, arid extremes of the Last Glacial Maximum (LGM, 22—18 ka) may have entailed widespread population extirpations. The high elevation Qinghai-Tibetan Plateau is significantly more extreme in both climate and environment than either the Gobi or the Siberian taiga forests, and provides an ideal setting to test fundamental models of human biogeog- raphy in the context of regional population fluctuations. The area is presently occupied primarily by nomadic pastoralists, but it is clear that these complex middle Holocene (<6 ka) economic adaptations were not a necessary prerequisite for successful colonization of the high elevation Plateau. Exploratory field-work in 2000—2001 has established that Upper Paleolithic hunter-gatherers were present on the Qinghai-Tibetan Plateau by at least 12 ka and possibly much earlier. A speculative model for the colonization process is developed and preliminary archaeological data in support of the model are presented.
文摘Rich paleoanthropological materials were unearthed in primary context from the Xinglongdong Cave in Fengjie County, Chongqing, South China, including a human tooth, numerous mammalian fossils, some stone artifacts and a Stegodon tusk exhibiting intentional engravings.Based on biostratigraphic data and uranium series dating,the cave was utilized as a human shelter about 120000-150000 years ago. It is the first time that an archaic Homo sapiens fossil has been unearthed from the Three Gorges Region. Engravings on the Stegodon tusk appear in groups,making up simple and abstract images. It is the earliest known engravings created by human beings; it exhibits great potential for the study of the origin of art and the development of ancient cultures in south China and bears important implications for the origin of modern humans in East Asia.
