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28. Matches, sulfur and red phosphorus are _________.
A. Explosives
B. Inflammable solid materials
C. Self-igniting articles
D. Oxidizing materials
Answer：B
Previous question: 27. Gun powder, explosives and detonating powder belong to which of the following dangerous chemicals?
Next question: 29. Which of the following is an inflammable solid material?
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 is the meaning of this sign?
- What is the meaning of this sign?
- What should be checked before driving?
- 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 is the meaning of this sign?
- Once inflammable gas causes a fire disaster, it should be put out with water in good time.
- What kind of harmful effect will be brought about by continuously using the foot brake on a long downhill road?
- What should motor vehicle drivers do when approaching an oncoming vehicle on a frozen road?
- When driving on a long downhill road, which is the best way to control the speed?
- How should lamps be used when motor vehicle drivers pass through a two-way tunnel?
- When a wounded person suffering bone fracture in the thigh, shank and spine, it is necessary to keep the fracture in position and refrain to move the wounded person.
- What is the meaning of this sign?
- What is the meaning of this sign?
- When rescuing a wounded person suffering spinal fracture, it is necessary to ___________.
- When putting out a fire disaster that gives out erosive steam or poisonous gas, the firefighters should wear gas masks and other related protective articles and should operate from the windward side.