用视觉形式对语言进行再编码的符号系统就是______。这种符号系统，就其所包含的类型来看，日语的假名是______，汉文属于典型的______。
“二次根式”是初中阶段学习的一个非常重要的内容，是在学生学习了平方根、立方根等内容的基础上进行的。本章的学习将为今后进一步学习根式奠定基础。本课对学生的要求是①理解二次根式的概念和意义；②用二次根式的意义和性质求取值范围；③会初步运用二次根式的性质解决简单的实际问题。根据题干来完成下列教学设计：
(1)给出本课程“二次根式”概念的课题引入并写出设计意图；
(2)根据教学要求设计教学环节，给出两个例子以进行知识探究并写出设计意图。
材料：
教师帮助学生确定中国近代资本主义经济的历史地位。
如果教师直接设问“中国近代资本主义经济的历史地位如何”，学生是难以回答的。教师若分层设问“近代中国资本主义经济的经济地位怎样？政治地位怎样？思想地位怎样？在当时的国情下预测它未来的发展趋势是怎样的呢？”等问题，学生就会比较容易理解。最后，师生在共同学习的基础上一起探讨，就能较好地归纳出近代中国资本主义经济的历史地位：①经济土，近代中国资本主义经济是一种新的、进步的经济因素，它的产生和发展有利于中国社会的进步。②政治上，它的产生导致了民族资产阶级产生，为维新变法运动和辛亥革命提供了社会基础，无产阶级的产生也为中国新民主主义革命的到来和中国共产党的建立准备了阶级基础。③思想上，伴随着中国资本主义的产生和发展，近代中国产生了维新变法思想、民主共和思想、民主科学思想，不断地冲击和动摇封建正统思想的统治地位，为西方资本主义思想文化的传播提供了社会条件，促进了近代中国的思想解放。④发展趋势上，近代资本主义工业由于资金少、规模小、技术力量薄弱，地区分布不合理，工业结构不完善，在一定程度上依赖外国资本主义、本国封建主义、官僚资本主义，难以独立发展。
问题：
请对该案例进行分析与评价。（16分）
设计任务：请阅读下面学生信息和语言素材，设计20分钟的英语听说教学方案。
教案没有固定格式，但须包含下列要点：
● teaching objectives
● teaching contents
● key and difficult points
● major steps and time allocation
● activities and justifications
教学时间：20分钟
学生概况：某城镇普通高中二年级（第一学期），班级人数40人，多数学生已经达到《普通高中英语课程标准（实验）》七级水平。学生课堂参与积极性一般。
语言素材：
The Louvre
From the earliest times, man has been interested in art. People have often worked together to collect and save the world's art treasure. Fine art treasures from many countries are kept in an art museum called the Louvre in Paris, France. The works of art have been collected by the people of France over many centuries.
The Louvre has not always been a museum. The ftrst building was a fort. In 1190, it was the kings' castle with high walls and a round tower. It had a moat to keep out his enemies. Over the years, the number of buildings around the castle grew. By 1350, the castle was no longer needed as a fort. The Louvre became a palace home for French kings and queens.
When Francis I became king of France in 1515,he brought in artists from many countries. One of the artists was Leonardo da Vinci from Italy. Da Vinci's "Mona Lisa" is the best known painting in the museum today. In 1973, the Louvre became a public museum, just as it is now. It is a place where art treasures have been saved for everyone to enjoy.
