脊柱损伤的搬运
【分析题】
下面是某英语教师在写作课的教学片段，阅读并回答问题。
Tell students we would write an article for our favorite sports, and the topic is about sports.
Show students a model article on the screen and lead them to find out the format of an article: main heading, smaller heading and the body.
Run a brainstorming activity: show some pictures about the sports and the famous athletes.
Ask students the questions as follows.
Why are you interested in that sport?
Who is your favorite athlete ?
What do you do to improve your skills?
Then I would ask them to have a discussion about the above questions. They can change their ideas with their partners and find out the similarities and differences. Then choose one idea to write with. After the discussion, I would pick some students to report their topics at the front.
根据上面的课堂教学片段回答下面三个问题：
(1)该片段属于什么教学环节？体现了哪种写作教学模式？
(2)请从写作教学原则的角度，评价该教学片段。
(3)该片段中教师的课堂角色有哪些？
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【分析题】
阅读材料：根据要求完成教学设计任务。
材料：初中物理某教科书“声音的产生与传播”一节中“声音的传播”的演示实验如下：
声音的作用
在图3-7中的玻璃罩内放一个音乐芯片。当玻璃罩有空气时，你能听到音乐声。
用抽气机抽取玻璃罩内的空气。在抽气的过程中，你听到音乐声有什么变化?
猜想，如果把玻璃罩内的空气完全抽出来。我们还能听见声音吗?
图3-7探究吉音传播的实验装置
(1)说明上述实验中“用抽气机抽取玻璃罩内的空气”的操作意图。(4分)
(2)基于该实验，设计一个体现师生交流的教学片段。(8分)
