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China has recently made exciting progress in aviation with its new AG600 “Kunlong”, the world’s largest amphibious aircraft. Developed entirely by Chinese engineers, this plane can take off and land on both land and water, making it a powerful tool for emergencies like forest fires, floods, and rescue missions.
The AG600 earned its official approval from China’s aviation authority after passing strict safety tests. This certification means the plane is ready to serve the public. Six AG600s have been ordered, with the first delivery expected soon.
The AG600 is as big as a Boeing 737. It can carry 12 tons of water in just 20 seconds to fight fires. For rescue missions, it can save up to 50 people at sea. The plane can fly up to 4,500 kilometers without refueling, reaching remote areas quickly.
Development of the AG600 began in 2009, involving over 300 Chinese research centers, companies, and schools. After its first flight in 2017, the AG600 completed tests in different environments — from airports in Guangdong to lakes in Hubei and even the Yellow Sea. Engineers also tested it in strong winds in Inner Mongolia to ensure safety in tough conditions.
The AG600 is China’s second amphibious aircraft, following the SH-5 from the 1970s. It joins two other homegrown planes — the Y-20 transport and C919 passenger jet — marking China’s progress in aviation technology.
Besides firefighting and rescue work, the AG600 will help with weather research and forest protection. Engineers are now improving its systems to handle more tasks. With its success, the AG600 shows China’s ability to solve real-world challenges through innovation.
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1.1. What does the underlined word “amphibious” mean in Chinese?
A 双引擎的.
B 超音速的.
C 水陆两用的.
D 节约能源的.
解析：选C。C 词义猜测题。根据第一段中划线词后面的“... the world’s largest amphibious aircraft... this plane can take off and land on both land and water...”可知，AG600能在陆地和水上起飞和降落，所以“amphibious”的意思是“水陆两用的”。故选C。
2.2. What happened to the AG600 after passing safety tests?
A It received official approval.
B It got a new name.
C It was sold to other countries.
D It failed further tests.
解析：选A。A 细节理解题。由第二段的“The AG600 earned its official approval from China’s aviation authority after passing strict safety tests.”可知，通过严格安全测试后，AG600获得了官方批准。故选A。
3.3. Why does the author mention “Boeing 737” in Paragraph 3?
A To praise foreign technology.
B To explain AG600’s speed.
C To describe AG600’s size.
D To compare fuel efficiency.
解析：选C。C 推理判断题。结合第三段后文可知，作者用波音737类比AG600的尺寸，目的是直观说明其大小。故选C。
4.4. Paragraph 4 is mainly organized by ______.
A listing numbers
B comparing events
C giving examples
D showing steps in time
解析：选D。D 篇章结构题。第四段按时间顺序描述开发过程（2009年启动→2017年首飞→后续测试），属于时间线结构。故选D。
5.5. What will engineers MOST LIKELY do next?
A Reduce production costs.
B Design smaller models.
C Improve task flexibility.
D Stop wind tests.
解析：选C。C 推理判断题。末段明确提到“improving systems to handle more tasks”。干扰项A（降成本）、B（小型化）、D（停止测试）均无依据。故选C。
