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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 _________.
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
- What should the driver do to follow other motor vehicles on a mountain road?
- When rescuing a wounded person who has been poisoned by toxic gas, the first measure is to send him to a place where air is fresh so that he will not continue to be poisoned.
- 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?
- What is the meaning of this sign?
- 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.
- What should be done by the driver who intends to overtake but finds that the vehicle in front is also overtaking?
- What is the meaning of this sign?
- What is the meaning of this sign?
- What is the meaning of this sign?
- What is the meaning of this sign?
- What is the meaning of this sign?
- What is the meaning of this sign?
- What is the meaning of this sign?
- When rescuers enter the scene to rescue the wounded after harmful gas leakage caused by traffic accidents, they must wear air respirators or cover their mouth and nose with wet towels.
- What is the meaning of this sign?
- What is the meaning of this sign?