根据题目要求完成下列任务，用中文作答。
请阅读以下某位老师在进行词汇教学时的情境，回答下面问题。
Step 1复习(revision)
互致问候后，教师将装有彩色小图片的信封分发给各小组。
T: Open the envelopes please. You have something nice in them. What are they?
S: A green ear, a red ball, a blue plane, a yellow cat...
T: What do you like?
S: I like...
Step 2导入(leading-in)
T: Let’s sing the song Who Is Wearing Yellow Today.
音乐结束后，教师并没有停下来，而是改编歌词继续唱。
T: Who is wearing blue today? blue today? blue today? Who is wearing blue today?
Step 3呈现(presentation)
T: Who is wearing blue today?
S: You are wearing blue today.
T: Yes, I’m wearing blue today. I’m wearing a blue sweater now.
学生跟读：sweater，sweater, blue sweater
T: I like the blue sweater. If you like it, please say it out loud.
PPT展示粉红色毛衣图片
T: Do you like the pink sweater?
S: Yes, I like the pink sweater.
（借助学生穿着的服装，引出jacket等新词，展开活动）
T: It is too hot. I'll take off my sweater. Please take off your jacket.
(伴随动作，依次教授词组：take off, put on, hang up和put away)
18【简答题】
教师在复习、导入及呈现环节创设了不同情境，请分别对其创设方法及作用进行分析。（15分）
答案及解析：本题考查教学环节的创设方法及其作用。本题的创设方法均为创设情境，其作用也就是我们在写教案过程的写作意图。
