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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?
- How to ensure motor vehicles have sufficient power when driving uphill?
- Once inflammable gas causes a fire disaster, it should be put out with water in good time.
- The wrong method to rescue a poisoned person in a traffic accident is 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.
- When a motor vehicle stops in snow, which lamp should be turned on?
- What should motor vehicle drivers do when parking temporarily on a rainy day?
- 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 main impact of foggy weather on safe driving?
- When rescuing the persons who are losing blood, it is necessary to ______ first.
- When a wounded person is under the wheel or cargo, the wrong method is to pull the limbs of the wounded.
- What is the meaning of this sign?
- What is the meaning of this sign?
- What is the meaning of this sign?
- When driving on a long downhill road, which is the best way to control driving speed?