Read the following expression chosen from academic introductions, and identify what part of an introduction it refers to:The increasing pollution of ground water resources by nitrites due to the anthropogenic activities from agriculture is receiving worldwide attention.
选项:
A:Background of the study
B:Significance of the study of that problem
C:Description of the skeleton of the research
D:Existing studies on the problem
发布时间:2024-05-23 19:44:40