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27. Gun powder, explosives and detonating powder belong to which of the following dangerous chemicals?
A. Oxidizing materials
B. Inflammable solid materials
C. Explosives
D. Self-igniting articles
Answer：C
Next question: 28. Matches, sulfur and red phosphorus are _________.
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 is the meaning of this sign?
- When discovering animals crossing the expressway on the highway, the driver should not drastically turn to evade.
- What is the meaning of this sign?
- When encountering a vehicle in front ascending on a mountainous road covered with ice and snow, what should the motor vehicle driver do?
- 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?
- What is the meaning of this sign?
- When there is bleeding at the bone fracture of a wounded person, the first thing to do is to keep it in position before stopping the bleeding and dress the wound.
- How will the adhesive force of road change when speed increases on a damp and slippery road?
- What is the meaning of this sign?
- When encountering an obstacle on one side of the road, what should vehicles do as they approach each other?
- What is the meaning of this sign?
- When a motor vehicle temporarily stops at night, which lamp should be turned on?
- How should lamps be used by the motor vehicle driver who follows a vehicle on a road section at night where he street light condition is good?
- Rescue personnel should check the breath of the unconscious person before applying any other emergency treatment.