该题考查英语学习者的词汇知识的广度，具体就是需要理解amphibious aircraft是水陆两用飞机。考生如果不常阅读有关军事技术的英文文章，就可能对 amphibious不熟悉，有些人即使在阅读中遇到这个词能够理解，但不一定能够随口 说出或在听到时瞬间抓住。所以，从根本上来说还是需要在平时的阅读中尽可能扩 大英语阅读和听力练习的范围。

[重点难点]
听懂、理解 amphibious 这个词的意思（ able to operate both on land and in water) 。

[录音原文]
China’s domestically developed AG600, the world’s largest amphibious aircraft， took its maiden flight ahead of schedule on Saturday from the southern city of Zhuhai. The AG600 was designed to extinguish forest fire and carry out rescue missions at sea.