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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.
2026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 2026 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?
- What is the meaning of this sign?
- What is the meaning of this sign?
- The article that cannot be used to stop bleeding by dressing is _________.
- When a motor vehicle temporarily stops in fog, which lamp should be turned on?
- What is the meaning of this sign?
- What is the most frequent problem for driving on a muddy road?
- What is the meaning of this sign?
- What should be done by the driver who intends to overtake but finds that the vehicle in front is also overtaking?
- When rescuing a wounded person in coma, it is necessary to take warm-keeping measures to prevent heat loss.
- What is the meaning of this sign?
- Dangerous chemicals possess the characteristics of explosion, inflammation, poison, erosion and radiation.
- 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.
- When rescuing a wounded person suffering spinal fracture, it is necessary to ___________.
- How to ensure safe driving at night?
- What is the meaning of this sign?