r World War II through a series of constitutions the British government granted Nigeria greater autonomy. October 1st 1960 Nigeria gained its independ
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1、r World War II through a series of constitutions the British government granted Nigeria greater autonomy. October 1st 1960 Nigeria gained its independence from the colonial masters. A new constitution was adopted in 1999 and a transition to civilian government after nearly 16 years of military rule. Although the April 2003 elections were marred by some irregularities, Nigeria is currently experiencing its longest period of civilian rule since independence.,Location, Size & Time,Western Afri。
2、题思路，并有效地解决问题。
2. 在解决问题过程的不断反思中，感受“替换”策略对于解决特定问题的价值，进一步发展分析和简单推理能力。
,学习目标,把720毫升果汁，倒入9个相同的小杯子，正好可以倒满，平均每个杯子的容量是多少毫升？,7209,80（毫升）,答：平均每个杯子的容量是80毫升。
,复习铺垫,把720毫升果汁，倒入3个相同的大杯子，正好可以倒满，平均每个杯子的容量是多少毫升？,7203,240（毫升）,答：平均每个杯子的容量是80毫升。
,复习铺垫,自主学习,小明把720毫升果汁，倒入6个小杯和1个大杯，正好可以倒满，已知小杯的容量是大杯的 ，小杯和大杯的容量各是多少毫升？,1,6个小杯的容量1个大杯的容量720毫升,大杯的容量 小杯的容量,小杯的容量 3 大杯的容量,绿色圃小学教育网http:/www.Lspjy.com 绿色圃中学资源网http:/cz.Lspjy.com,小明把720毫升果汁，倒入6个小杯和1个大杯，正好可以倒满，已知小杯的容量是大杯的 ，小杯和大杯的容量各是多少毫升？,2,假设把72。
