目录：

科技OO的引言一般包括

发展社会学OO

科技OO的引言一般包括

1、研究主题。说明该OO拟研究的内容(不要展开讨论)、理论依据、实验基础和研究方法，主要解决什么问题(即研究目的)，创新点是什么。如果OO是现场调查报告，应说明工作场所、协作单位；有时间性的工作，应说明工作期限和时间。

2、研究的应用前景。任何研究工作都有其潜在的用途，有的本身就是一项应用研究，即便某些基础性较强的研究，也是可大致预测应用于某些方面的。所以在引言的结尾处指明本研究成果可用在何领域或可间接起到何种作用和意义，无疑会给读者一个完整的概念，也是吸引读者继续细读OO的一种手段。

3、写作要求。引言一般不立标题，不分段落。引言应开门见山，言简意赅，实事求是，叙述清楚，禁绝空话，不有意抬高自己或贬低他人，避免前后重复。引言的背景文献材料要具体、准确，要从大量文献中挑选出与该课题内容直接相关的文献，用简洁的语言将前人研究的主题思想表达出来；遇到文献不多的冷门课题，则检索引用的背景文献的专业范围可宽一些。

发展社会学OO

1、1 Polylactide (PLA) has received much attention in recent years due to its biodegradable properties, which offer important economic benefits. 2 PLA is a polymer obtained from corn and is produced by the polymerization of lactide. 3 It has OOny possible uses in the biomedical field1 and has also been investigated as a potential engineering OOterial. 4 However, it has been found to be too weak under impact to be used commercially.

2、5 One way to toughen polymers is to incorporate a layer of rubber particles and there has been extensive research regarding the rubber modification of PLA. 6 For exOOple, Penney et al. showed that PLA composites could be prepared using blending techniques and more recently, Hillier established the toughness of such composites. 7 However, although the effect of the rubber particles on the mechanical properties of copolymer systems was demonstrated over two years ago, little attention has been paid to the selection of an appropriate rubber component.

3、8 The present OOOOO presents a set of criteria for selecting such a component. 9 On the basis of these criteria it then describes the preparation of a set of polymer blends using PLA and a hydro-carbon rubber (PI). 10 This combination of two mechanistically distinct polymerizations formed a novel copolymer in which the incorporation of PI significantly increased flexibility.