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30. Once inflammable gas causes a fire disaster, it should be put out with water in good time.
Answer：N
Previous question: 29. Which of the following is an inflammable solid material?
Next question: 31. When an erosive material catches fire, it should not be put out with water cannon.
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
- When following other vehicles on a foggy day, what should the driver do?
- When a wounded person suffering burns is thirsty, he may drink a small quantity of slightly salty water.
- What is the meaning of this sign?
- How should lamps be used by the motor vehicle driver who follows a vehicle on a road section at night where he street light condition is good?
- What is the meaning of this sign?
- When rescuing a wounded person in an emergency, it is necessary to firstly stop the bleeding by compression before other methods are taken according to the conditions of bleeding.
- What is the meaning of this sign?
- When a motor vehicle stops temporarily in a rainy day,which lamp should be turned on?
- What is the meaning of this sign?
- When a motor vehicle stops in snow, which lamp should be turned on?
- Which of the following measures is correct for rescuing a person sustaining full-body burns?
- Dangerous chemicals possess the characteristics of explosion, inflammation, poison, erosion and radiation.
- What should the driver do to follow other motor vehicles on a mountain road?
- What is the meaning of this sign?
- The article that cannot be used to stop bleeding by dressing is _________.
- What is the meaning of this sign?