This paper discusses the science of water resources, including research objectives, assignment, content and current study emphasis.
论述了水资源学的科学体系，包括研究对象、任务、内容和当前的研究重点。
This research not only enriches the type, content and meaning of chemistry assignment in senior middle school, but provides Suggestions and implications for teacher to design chemistry assignment.
本研究丰富了高中化学作业的类型、内容和意义，为教师设计化学作业提供借鉴作用。
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