Unit 9 The world’s highest mountain is 8,844 meters high.Section APeriod One (section A ,1a ,1b ,1c ,2a ,2b)Teaching aims:1.复习掌握形容词比较级和最高级用法2.复习掌握数词用法3.Language Points :1.词汇: Asia, size ,desert, deep, bamboo, southeast, civilization, man—made, Per2.句型 :Did you know that Qomolangma is the highest mountain in the word?It’s 1,025 meters deep.The world’s deepest salt lake is the Caspian.Difficulties: 几个外国地名的读法及写法Step 1 Pres..