简述最近发展区及启示。
1.题目:多边形和圆的初步认识
2.内容:

3.基本要求:
(1)有板书。
(2)让学生会判断正多边形,理解正多边形、圆、圆弧的含义。
(3)教学中体现师生间的交流互动,有适当的提问环节。
(4)请在10分钟内完成试讲内容。
4.答辩
(1)在教学将“多边形分割成几个三角形”时,如何做到不重不漏?
(2)多边形的外角和是多少度?怎么证明?
根据题目要求完成下列任务。用中文作答。
下面是某初中教师在教学一篇有关职业的课文前的活动片段。
(上课铃响,教师先让学生听一首英文歌曲,然后进行下列活动)
T: How do you like this song? Do you know the name of this song?
S1: Sorry, I don´ t know.
T: It´s OK. Does anybody know the name of this singer?
S2: His name is Robbie Williams.
T: Exactly, Do you know the name of the song?
S2: A Better Man.
T: Excellent! It´ s A Better Man. Hum, we don´ t know much about him, but he is a singer.
Well, Lily, would you like to be a singer in the future?
S3: No.
T: What would you like to be?
S3: I want to be a doctor.
T: (To $4) What would you like to be?
S4: I want to be a teacher.
…(该活动持续10分钟)
根据上面的信息.从下面三个方面作答:
(1)指出该教学活动的环节、目的和注意事项。(10分)
(2)简析教师的设计意图与方法。(10分)
(3)指出该教学活动片段存在的问题。(10分)
/L,N73%,L27% 。尿便常规无异常 。脑脊液:压力220mmH
O,外观清,细胞数0 .138×10
/L,中性粒细胞65%,淋巴细胞35%,蛋白+++,糖>0 .5g/L,氯化物7 .0g/L,涂片未查见细菌 。