关于高校慕课平台发展的现状与解决对策

慕课的诞生为我们带来了学习的便捷,加快了我国教育信息化的步伐,但目前高校慕课还存在着辍学率高、利用率低和兼容性低等问题。本文以改善高校慕课发展为出发点,分析了高校自建慕课平台的发展瓶颈,针对上述的问题给出了相应的解决方案,以期为高校慕课的发展提供建议。

Overview of the children＇s English acquisition

English has become the medium for communication in so many areas, and children are the hope of the future and shoulder the duties to structure the future. Children＇s English becomes more important and spreads all over the world, especially in recent years. Children＇s English is not perfect and there exist its own disadvantages. This paper gives four optimizations and suggestions in teaching children＇s English in order to solve the problem. Then it lists several relations to the children＇s English study, and these four relations are very important because they are the keys to lead the children＇s English to a healthy and developing road. And in the next chapter, it talks about the trends of the children＇s English in the future and lists the reasons why these kinds of trends appear. At last, the author overlooks the whole paper and gives a conclusion, which shows that children＇s English has a great potentiality in the future in China.

白炭黑/聚氨酯弹性体涂层的制备及性能研究

白炭黑作为补强材料,常用于橡胶的改性,提高橡胶的力学性能。因此本论文将白炭黑与聚氨酯弹性体相结合,制备出一系列聚氨酯弹性体涂层。实验结果表明,白炭黑的含量不超过2wt%时,涂层仍能保留优异的透明性和自流平性,且力学性能得到了提高。当添加2wt%,其断裂伸长率由285%提高到352%,拉伸强度由3.69MPa提升到5.11MPa。