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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?
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
- Once inflammable gas causes a fire disaster, it should be put out with water in good time.
- What is the meaning of this sign?
- 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?
- When rescuing the persons who are losing blood, it is necessary to ______ first.
- What is the meaning of this sign?
- What is the meaning of this sign?
- 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.
- When a wounded person suffering burns is thirsty, he may drink a small quantity of slightly salty water.
- How to ensure motor vehicles have sufficient power when driving uphill?
- What is the meaning of this sign?
- What is the meaning of this sign?
- 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.
- When the tire pressure is too low, what can happen when driving at a high speed?
- Gun powder, explosives and detonating powder belong to which of the following dangerous chemicals?