In physics, one approach takes this impulse for unification to its extreme, and seeks a theory of everything--a single generative equation for all we see.

三元及第

简要病史：患者，女，55岁，间断大便带血伴有排便次数增加和排便不畅感2个月 。
初步诊断：直肠癌

请以“眼光与定力”为题写一篇论说文，700字左右。

体质

初中数学《一元二次方程》
考题回顾

设计任务：请阅读下面学生信息和语言素材，设计20分钟的英语阅读教学方案。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：某城镇普通高中一年级（第一学期）学生，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）》五级水平。学生课堂参与积极性一般。
语言素材：
Body Language
Debbie and Simon have part-time jobs at a travel agency.It is Saturday morning and they are sitting in the office.Debbie and Simon looked up as a well-dressed lady entered.The lady glanced at them both，then walked over to Debbie.Debbie greeted her cheerfully.
“Hello，"the lady said."I want to go by train from..…"
Simon sighed，Mr.Young，a senior employee，was standing beside him.
“What's up，Simon？You don't look very happy."
“The customers always prefer Debbie to me.I don't understand why.”
“I do.It's the way you communicate.”
“How can that be？”Simon asked."I don't even get a chance to speak to them."
“Speech is not the only method of communication.Your body language is important，too."
“What kind of language is that？”
“It's the way you stand and sit.It's your gestures and the expression on your face and in your eyes.Your whole appearance communicates things.You often rest your head on our hand.You don't look up.You never smile.So you don't make a good impression on people."
“But look at Debbie.She makes eye contact with the customers.She's holding her head up. She smiles，that's why the customers go to her and not to you."

科学探究教学模式的理论基础是（　　）学习论及（　　）教学论。

感伤主义

1.题目：《圆柱的表面积》

2.内容：

3.基本内容：

（1）试讲时间10分钟；

（2）要有适当的板书；

（3）条例清晰、重点突出。

4.答辩：

圆柱的表面积和圆锥的表面积的区别是什么？

“两角差的余弦公式”是高中数学教材中的重要公式，只有对两角差的余弦有了认识，才能够以此为基础推导其他三角恒等变换公式。这是一个逻辑推理过程，也是一个认识三角函数式的特征，体会三角恒等变换特点的过程。
请完成下列问题：
(1)设计“两角差的余弦公式”的教学目标；
(2)写出“两角差的余弦公式”的教学重点和难点；
(3)写出“两角差的余弦公式”的探究过程(要求使学生意识到，向量方法可能是解决问题的工具)。