TWO： Teacher：We all know that beat causes an object to expand an cold cauese it to contract. Now，can anyone give me a good example?
John：Well ，in the summer the days are long，and in the winter the days are short.
老师：我们都知道热胀冷缩的道理。现在，谁给我举个例子?
约翰：嗯，在夏天天都长，在冬天天都短。
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2016春科普版英语四下Lesson 1《Whose watch is it》ppt课件2
2016春科普版英语四下Lesson 5《What are these》ppt课件2
2016春科普版英语五下Lesson 9《Do you always have lunch at twelve》word教案
2016春科普版英语四下Lesson 7《Let’s go swimming》ppt课件2
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2016春科普版英语四下Lesson 7《Let’s go swimming》ppt课件1
2016春科普版英语四下Lesson 9《I like summer》ppt课件1
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2016春科普版英语四下Lesson 1《Whose watch is it》ppt课件4
2016春科普版英语四下Lesson 1《Whose watch is it》word教案1
2016春科普版英语四下Lesson 8《Do you have a ruler》ppt课件1
2016春科普版英语五下Lesson 1《May I speak to Mary》word教案
2016春科普版英语四下Lesson 9《I like summer》ppt课件3
2016春科普版英语四下Lesson 4《Where are you from》ppt课件3
2016春科普版英语四年级下册全册教案
2016春科普版英语六下Lesson 2《Did you play basketball yesterday》word教案
2016春科普版英语四年级下册全册教案1
2016春科普版英语四下Lesson 3《They are in Class Three》ppt课件1
2016春科普版英语五下Lesson 10《Does she always come before six thirty》ppt课件1
2016春科普版英语四下Lesson 2《What colour are the trousers》ppt课件4
2016春科普版英语四下Lesson 2《What colour are the trousers》ppt课件5
2016春科普版英语六下Lesson 3《Did you go boating last Sunday》word教案
2016春科普版英语五下Lesson 5《What do you do》word教案
2016春科普版英语四下Lesson 6《Revision》ppt课件1
2016春科普版英语四下Lesson 4《Where are you from》word教案
2016春科普版英语三年级下册全册教案
2016春科普版英语六下Lesson 4《What did you do last saturday》word教案
2016春科普版英语四下Lesson 3《They are in Class Three》ppt课件3