论文部分内容阅读
金吉列公司留学业务竞争战略研究
【机 构】
:
兰州大学
【出 处】
:
兰州大学
【发表日期】
:
2021年01期
【基金项目】
:
其他文献
测量工具在家庭作业的有效性的研究中起着基础性的作用。以往研究中,家庭作业的测量工具只关注了家庭作业的某一方面;我们的元分析结果显示,测量工具不同,家庭作业与学习成绩的关系也不同。为了消除分歧就需要一个综合性的家庭作业量表。在文献综述的基础上,本文从理论上建构了一个多维的家庭作业综合量表(multidimensional Homework Scale, MHS),并对初中生进行了调查。MHS初始问卷
In-situ U-Pb,Hf and Re-Os isotopic analyses of the Xiangshan Ni-Cu-Co deposit in Eastern Tianshan(Xi
The timing and genesis of the major Ni-Cu-Co sulfide deposit in the Xiangshan intrusion have been studied based on newly obtained in-situ U-Pb,Hf and Re-Os isotopic analyses.The SIMS U-Pb zircon ages
Subduction-induced mantle heterogeneity beneath Eastern Tianshan and Beishan:Insights from Nd-Sr-Hf-
Extensive late Paleozoic mafic-ultramafic complexes in the Eastern Tianshan and Beishan regions in the southern Central Asian Orogenic Belt(CAOB) represent an ideal opportunity to assess the character
U-Pb ages and Hf-O isotopes of zircons from Late Paleozoic mafic-ultramafic units in the southern Ce
U-Pb age and Hf-O isotope data of zircons from the mafic-ultramafic complexes and their related rhyolites and granites in the Eastern Tianshan and Beishan regions were obtained by SIMS and LA-ICPMS.Th
Provenance of metasedimentary rocks from the Beishan orogenic collage,southern Altaids:Constraints f
The origin and tectonic settings of metasedimentary sequences in the Central Asian Orogenic Belt have been a matter of debate regarding their contributions with some proposals of being microcontinents
The role of crustal contamination in the formation of Ni-Cu sulfide deposits in Eastern Tianshan,Xin
Tulaergen,Xiangshan,Huangshan.Tianyu,and Baishiquan magmatic Ni-Cu sulfide deposits,which are all located in the eastern part of the Central Asian Orogenic Belt,and associated with small mafic-ultrama