1、Unit1 B.Lets read,Sperm Whale 抹香鲸,Killer Whale 虎鲸,Sperm Whale 抹香鲸,Killer Whale 虎鲸,单位名称,cm = centimeter （厘米）,m = meter （米）,kg = kilogram （千克）,t = ton （吨）,km = kilometer （千米）,g = gram （克）,二、听音，补充单词或数字：,1.A sperm whale is than a killer whale in its length. 2.A killer whale is than a sperm whale in its
2、size. 3.A sperm whale has 50 teeth.It has more teeth than a killer whale. 4.The length of a sperm whales tooth is cm .,课本练习:,longer,smaller,10,20,( )1.The sperm whale is longer than the killer whale. ( )2.The sperm whale is heavier than the killer whale. ( )3.The killer whale is shorter than the sperm whale. ( )4.The killer whale has more（更多） teeth than the sperm whale. ( )5.The sperm whale can jump out of the water.,判断对错：,Sperm Whale 抹香鲸,Killer Whale 虎鲸,我们要保护动物！,小结：,1、小组再阅读多一次，互相讨论两种鲸鱼的特征。看你比较喜欢哪一种鲸鱼。 2、了解你的朋友喜欢哪种动物及它的外貌特征，把它记录下来。,Homework:,
