"经济整合"是指两个或两个以上的公司紧密联系的方式.现今,经济整合在旅游业中相当常见.旅游企业间的经济整合可作如下分类:(1)按整合方向分为垂直整合、水平整合、聚集整合;
Magnetic fields are observed everywhere in the universe.In this review,we concentrate on the observational aspects of the magnetic fields of Galactic and extrag
传统观点认为,道德都是利他的,即使利于道德行为者,也只能给其带来某些精神利益。其实,作为道德基础的道德利益不仅指他利,也包含着自利,自利的内容既有精神性的,又有物质性
Gamma-ray bursts (GRBs) are the most intense transient gamma-ray events in the sky; this, together with the strong evidence (the isotropic and in homogeneous di
2月15日，三门核电站1号机组最后一台主泵吊装工作圆满完成，这标志着三门核电站1号机组4台主泵吊装工作全部圆满完成。
1RXS J232953.9+062814 was identified as a cataclysmic variable by Wei et al. (1999). Four low-resolution spectra of 1RXS J232953.9+062814 were obtained with the
IRAS 01005＋7910 is a cold IRAS source. We present its optical identification, photometric and spectroscopic observation results. Its optical counterpart is clas
We present a snapshot of our recent results of a variable star survey in1 degree fields around three open clusters: NGC 188, NGC 7789 and M67. A totalnumber of
李开盛,男,1939年9月生,山东肥城人.1965年7月毕业于河南大学政治教育系,现为信阳农专教授,兼河南省高等学校哲学教学研究会理事,1994年被评为首届河南省普通高校“两课”优