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31. When an erosive material catches fire, it should not be put out with water cannon.
Answer：Y
Previous question: 30. Once inflammable gas causes a fire disaster, it should be put out with water in good time.
Next question: 32. Dangerous chemicals possess the characteristics of explosion, inflammation, poison, erosion and radiation.
2025年摩托车科目四英文版题库共345题，你可以免费查看前50题，完整版题库请添加微信购买：
The English version of the 2025 motorcycle subject 4 question bank has a total of 345 questions. You can view the top 50 questions for free. Please add WeChat to purchase the complete version of the question bank.
科目四试题
- How to reduce speed or stop when driving on a road covered with snow and ice?
- When a gas tanker is leaking heavily, which of the following measures is wrong?
- When following other vehicles on a foggy day, what should the driver do?
- Gun powder, explosives and detonating powder belong to which of the following dangerous chemicals?
- How should lamps be used when motor vehicle drivers pass through a two-way tunnel?
- What is the meaning of this sign?
- What is the meaning of this sign?
- What is the main impact of foggy weather on safe driving?
- When using splints, sticks or tree branches to keep the unexposed bones in position, it is necessary that these things should exceed the upper and lower joints of the wound.
- What is the meaning of this sign?
- What is the meaning of this sign?
- Once inflammable gas causes a fire disaster, it should be put out with water in good time.
- What is the meaning of this sign?
- What should be checked before driving?
- What is the meaning of this sign?
- When rescuing the injured, it is necessary to ________.