The sporopollen analysis has been made of the 783 samples of the surface sediments collected from the offshore water ares of the western Bohai Sea in this paper. Abundant sporopollen is found and three regions of spor...The sporopollen analysis has been made of the 783 samples of the surface sediments collected from the offshore water ares of the western Bohai Sea in this paper. Abundant sporopollen is found and three regions of sporopollen assemblage with distinctive features are identified. They are Pinus-Artemisis-Quercus assemblage region in the sea area of Shanhaiguan-Yanghekou; Firms-Chenopoeliaceae-Artemisia assemblage region in the sea area of Yanghekou-Nanbao and Chenopodiaceae-Artemisia-Pinus assemblage region in the sea area of Nanbao = Dakouhe. After analysis of and discussion on each assemblage region, it is found that sporopollen assemblages in the sea areas are not only controlled by the coastal vegetation, but also by other natural factors. In this paper emphasis is placed on the influence of the river on sporopollen assemblage. The sporopollen assemblage division proposed in this paper will provide very useful inspiration for dividing the sediment types and studying the hydrodynamic mechanism of the展开更多
English learner must posses the four basis language skills of speaking writing, listening and reading. Speaking and writing involve language Production and therefore often referred to as Productive skills. Listening a...English learner must posses the four basis language skills of speaking writing, listening and reading. Speaking and writing involve language Production and therefore often referred to as Productive skills. Listening and reading, on the other hand, involve receiving messages and are therefore often referred to as receptive skills.展开更多
The preferential sputtering and post-bombardment surface segregation for two-phase AgNi alloys at roan temperature by AES are reported It was found that Ag is the surface preferential sputtering element in the whole r...The preferential sputtering and post-bombardment surface segregation for two-phase AgNi alloys at roan temperature by AES are reported It was found that Ag is the surface preferential sputtering element in the whole range of composition. It was also found that there is an obvious post-展开更多
China and Mexico signed agreements on December 17 in Beijing on cooperation across a wide range of industries. The pacts were in the fields of agriculture, fisheries and the chemical industry. The signing of the pacts...China and Mexico signed agreements on December 17 in Beijing on cooperation across a wide range of industries. The pacts were in the fields of agriculture, fisheries and the chemical industry. The signing of the pacts came on the first day of Mexican President Salinas’s four-day visit to China.展开更多
文摘The sporopollen analysis has been made of the 783 samples of the surface sediments collected from the offshore water ares of the western Bohai Sea in this paper. Abundant sporopollen is found and three regions of sporopollen assemblage with distinctive features are identified. They are Pinus-Artemisis-Quercus assemblage region in the sea area of Shanhaiguan-Yanghekou; Firms-Chenopoeliaceae-Artemisia assemblage region in the sea area of Yanghekou-Nanbao and Chenopodiaceae-Artemisia-Pinus assemblage region in the sea area of Nanbao = Dakouhe. After analysis of and discussion on each assemblage region, it is found that sporopollen assemblages in the sea areas are not only controlled by the coastal vegetation, but also by other natural factors. In this paper emphasis is placed on the influence of the river on sporopollen assemblage. The sporopollen assemblage division proposed in this paper will provide very useful inspiration for dividing the sediment types and studying the hydrodynamic mechanism of the
文摘English learner must posses the four basis language skills of speaking writing, listening and reading. Speaking and writing involve language Production and therefore often referred to as Productive skills. Listening and reading, on the other hand, involve receiving messages and are therefore often referred to as receptive skills.
文摘The preferential sputtering and post-bombardment surface segregation for two-phase AgNi alloys at roan temperature by AES are reported It was found that Ag is the surface preferential sputtering element in the whole range of composition. It was also found that there is an obvious post-
文摘China and Mexico signed agreements on December 17 in Beijing on cooperation across a wide range of industries. The pacts were in the fields of agriculture, fisheries and the chemical industry. The signing of the pacts came on the first day of Mexican President Salinas’s four-day visit to China.
