“预习”先知 “共习”同知 “延习”广知——“三单”引领下小学英语生生课堂的实践与研究

传统而单一的灌输式教学令小学英语课堂枯燥乏味，也让学生原本高涨的学习兴趣一点一点降低，甚至起到反作用，使学生丧失应有的学习能力和创想能力。“三单”的有效开发与运用大大提高了课堂效率，让教师可以笃定地伸手向课堂要质量，也能促进教师对教材的研读、对学情的关注、对课堂的研磨、对评价的改革。

Research progresses of artificial intelligence in MRI of lumbar degenerative diseases

The incidence of lumbar degenerative diseases is increasing year by year,and MRI is often used in clinical diagnosis.In recent years,artificial intelligence(AI)has rapidly developed in medical field and can be used for image segmentation and auxiliary diagnosis of lumbar degenerative diseases.The research progresses of AI in MRI of lumbar degenerative diseases were reviewed in this article.