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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 the wounded person is suffering main artery bleeding, where should the rescue personnel press by thumb to stop the bleeding?
- What is the meaning of this sign?
- When a motor vehicle passes over an overflowing bridge, what should the driver do after stopping and observing closely?
- How should lamps be used when a motor vehicle meets an oncoming bicycle on a narrow road or a narrow bridge at night?
- When a motor vehicle temporarily stops in fog, which lamp should be turned on?
- What is the meaning of this sign?
- What is the meaning of this sign?
- What is the meaning of this sign?
- What is the meaning of this sign?
- How to reduce speed or stop when driving on a road covered with snow and ice?
- What is the meaning of this sign?
- When removing a wounded person suffering spinal fracture, the rescuer should never help the wounded person to walk. He may be carried away with a soft stretcher.
- What is the meaning of this sign?
- What influence does smoking have upon driving?
- What is the meaning of this sign?
- What is the meaning of this sign?