B
In the face of fires, every second counts and every life matters. That's why a company has developed special robot dogs to help fight fires.
These robot dogs are very helpful. While burning（燃烧的）buildings are too dangerous for people, that is not a problem for robot dogs. They can climb stairs（楼梯）and keep their balance on four robotic legs. With water guns on their backs, they can shoot water over a long distance to put out the fire. The robot dogs are also smart—they can send real-time information and videos back to firefighters waiting outside. This helps the firefighters "see" what is happening inside the burning buildings and make efficient plans.
It is important to know that these robot dogs are not here to take the place of human firefighters in emergency services. Instead, they are valuable helpers. They go into dangerous areas first so that human firefighters can stay safer. They are like partners of firefighters, using technology to protect everyone.
Cities in China, such as Qingdao, are ready to test（测试）these robots. In the future, these robot dogs may work with AI to help even more. The development of firefighting robot dogs is not a separate plan.
It is part of China's big goal to build smart and safe cities using science and technology.
In a word, these robot dogs are more than machines—they will surely be great helpers in the future.
(
C
)49. What is the main purpose of developing the robot dogs?
A. To show China's excellent progress in AI.
B. To test new robotic technology in smart cities.
C. To help fight fires and save lives in dangerous situations.
D. To make videos inside burning buildings for news reports.
(
C
)50. What does the underlined word "It" refer to in the fourth paragraph?
A. Testing firefighting robot dogs.
B. Making robot dogs work with AI.
C. Developing firefighting robot dogs.
D. Finding the true role of the robot dogs.
(
D
)51. Which of the following can we infer from the passage?
A. The robot dogs are ready for common use.
B. Science and technology can stop buildings from burning.
C. The robot dogs will replace human firefighters in the near future.
D. Science and technology can play an important role in emergency services.
(
C
)52. What's the best title for this passage?
A. Robot Dogs: The Future of Firefighting
B. Smart City Helpers: Robot Dogs in Qingdao
C. Firefighting Robot Dogs: High-tech Helpers
D. Qingdao: The First City to Test Robot Dogs
C
We should all have at least one extinguisher（灭火器）somewhere in our house or office building. However, it's not enough to simply keep an extinguisher somewhere. The best way to be ready for a sudden fire is to study this guide carefully and review it from time to time. Here is what we should do when a fire suddenly breaks out.
(1)Have a clear exit route（疏散路线）
Before using the extinguisher, make sure you have a clear exit route. If you cannot put out the fire, you will need
(2)Report the fire
Even if the fire appears manageable, you should always have the firemen on the way. Once they arrive, they can double-check to see if the fire has been completely put out.
(3)Stand back
Face the fire and keep your back to the clear exit. You should stay between 1.8 and 2.5 metres away from the flames（火焰）as you prepare to use the extinguisher.
(4)Use the extinguisher
It can be difficult to think clearly during a fire. One method to help you remember how to use an extinguisher is to remember "PASS":
▶P—Pull: Pull the pin on the extinguisher.
▶A—Aim: Aim low. Point the nozzle at the bottom of the fire.
▶S—Squeeze（挤压）: Squeeze the handle to let out the extinguishing chemicals.
▶S—Sweep: Sweep the nozzle from side to side until the fire is put out.
(5)Keep an eye on the fire
After the fire appears to be out, continue to watch the fire area to make sure it doesn't start burning again. If the fire starts again, repeat "PASS".
(6)Get to a safe place
Once the fire is out, or if you are unable to put it out, find a place out of reach of the fire.
(
D
)53. What is the text about?
A. How to prevent a big fire.
B. How to use an extinguisher.
C. How to keep an extinguisher.
D. How to deal with a sudden fire.
(
C
)54. 创新设题 图文理解＞＞ Which order of the pictures describes "PASS"?
A. ③②④①
B. ②①④③
C. ②④③①
D. ③①④②
(
B
)55. In which theme activity can the text be used?
A. A better self.
B. Safety with me.
C. Young scientists.
D. Home, sweet home.
