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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
- How should lamps be used when motor vehicle drivers pass through a two-way tunnel?
- 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 gas tanker is leaking heavily, which of the following measures is wrong?
- What is the meaning of this sign?
- What is the meaning of this sign?
- When a motor vehicle encounters an accident, the driver should pay attention to whether there is fuel leakage, pipeline rupture, so as avoid accidents.
- What kind of harmful effect will be brought about by continuously using the foot brake on a long downhill road?
- Which of the following measures is incorrect when a motor vehicle stops?
- What is the meaning of this sign?
- What is the meaning of this sign?
- What should the driver do when he/she encounters an oncoming ambulance in the same lane?
- What is the meaning of this sign?
- What is the meaning of this sign?
- What is the main impact of foggy weather on safe driving?
- Rescue personnel should check the breath of the unconscious person before applying any other emergency treatment.