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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
- What should the driver do when he/she encounters an oncoming ambulance in the same lane?
- When the wounded person is suffering main artery bleeding, where should the rescue personnel press by thumb to stop the bleeding?
- How should lamps be used when a motor vehicle meets an oncoming bicycle on a narrow road or a narrow bridge at night?
- When rescuing the injured, it is necessary to ________.
- Gun powder, explosives and detonating powder belong to which of the following dangerous chemicals?
- Which of the following measures is correct for rescuing a person sustaining full-body burns?
- Which lamp should be used when motor vehicles pass hrough an intersection at night where there is no traffic light signal?
- The first-aid measure to rescue a poisoned person is to _______.
- What should be checked before driving?
- What is the meaning of this sign?
- What is the meaning of this sign?
- When the tire pressure is too low, what will happen if the tire changes its shape in waves and increases in temperature due to fast movement?
- What is the meaning of this sign?
- When a gas tanker is leaking heavily, which of the following measures is wrong?
- What is the meaning of this sign?
- What should be done by the driver who intends to overtake but the motor vehicle in front neither reduces its speed nor allows the right of way?