本轮金融危机我国率先走出,试论述社会主义市场经济制度的优越性。[人大]
下面内容是某教师讲解remember doing something和 remember to do something语言点时的课堂实录。
Teacher: Li Hua, what did you do last Sunday morning?
Li Hua: I played badminton with my friends.
Teacher (to.the.class): Did Hua remember playing badminton with her friends?
Students: Yes, she did.
Teacher: Liu Ying, what did you do last Sunday morning?
Liu Ying: I visited my grandparents
Teacher (to the class): Did Liu Ying remember visiting her grandparents?
Students: Yes, she did.
Teacher: What will you do this Sunday morning then, Liu Ying?
Liu.Ying: I will see a film with my sister.
Teacher: Please remember to take the tickets with you and be there on time.
Liu.Ying: Sure, I will remember to do that. Thank you.
Teacher: Now, class. Can you tell the difference between “remember doing sth.” and “remember to do sth.”? Look at the following diagrams:
请根据此教学情景回答下列问题:
(1)该教师在讲解知识点时运用了哪两种方法?(8分)
(2)这些方法各自有何特点(8分)?能发挥什么作用?(8分)
(3)使用这些方法时应重点注意什么?(6分)
案例:某教师在对根与系数关系综合运用教学时,给学生出了如下一道练习题:设α、β是方程χ
-2kχ+k+6=0的两个实根,则(α-1)
+(β-1)
的最小值是( ) 。 A .
B .8 C .18 D .不存在 某学生的解答过程如下: 利用一元二次方程根与系数的关系易得:α+β=2k,αβ=k+6 所以
。故选A 。 问题:(1)指出该生解题过程中的错误,分析其错误原因; (2)给出你的正确解答; (3)指出你在解题时运用的数学思想方法 。
。求质点在时刻t=1的速度的大小。