地貌学研究地形的成因及其变化.Geomorphology deals with the origin of landscapes and changes in them.和地下的水道砂岩打交道的石油地质工作者,必须具备地貌学方面的基础知识.The petroleum exploration geologist working with subsurface channel sandstone must have a background...
对 聚亚 磺酰氨基酰胺 ( PSAA ) 作为新型抗氧化反渗透膜材料的可能性,以及聚合条件和成膜条件对膜性能的影响作了初步研究.The possibility poly ( sulfonamido ) amide ( PSAA ) a new reverse osmosis membrane material with anti - oxidation properties was preliminary studied....