听力 1。wool (walk) question: the process the funciton of pushing the cloth to the rol 2. a bird named "P" who use the different way to escape the fox 3。纳米材料
要重视语法! 阅读(不难) 1。 美国土著生活在海岸边。他们的特征:社会分工, 2.大BAT and small bat,他们的声纳系统。 3。美国的铁路发展 4。亚利斯夺得 和 地球的周长 chronicly = constantly fierce=? (may be aggrasive)