Unit 7 Whats the highest mountain in the world ?1. The Sahara is about 9,600 ,000 _ _ (平方公里) in size . square kilometers square adj. “平方米” , 用于数字后表面积。 n , 正方形;广场in size (面积)大小2. 珠穆朗玛峰大约8,844米高。Qomolangma is about 8,844 _ _ . meters high .在英语中,表示事物的长、宽、高、深时,结构为: “基数词 + 单位名词+ 形容词(long, wide, tall , deep等)”。单位词有: meter,foot(英尺),inch(英寸),kilometer(千米)kilogram(公斤) 等3. He is 2 meters tall. (同义句)He is a _ man .