The Unified Modelling Language is a standard graphical language for modelling object oriented software At the end of the 1980s and the beginning of 1990s, the first object￾oriented development processes appeared The proliferation of methods and notations tended to cause

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外研版（三起）（2012）小学英语四年级下册Module 1 Unit 1 She's a nice teacher.教案(1)

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外研版（三起）（2012）小学英语四年级下册Module 1 Unit 1 She's a nice teacher.习题(2)

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外研版（三起）（2012）小学英语三年级下册Module 10 Unit 2 She's got an orange sweater.习题(3)