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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
- Which lamp should be turned on when motor vehicles pass through a road section at night where the street light condition is good?
- Which of the following is a bad habit when changing lanes?
- When an erosive material catches fire, it should not be put out with water cannon.
- What is the meaning of this sign?
- What needs attention when a motor vehicle drives on a road covered with ice and snow?
- 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.
- When a wounded person is unable to get off the vehicle by himself, he should be removed from the vehicle so as to avoid a secondary injury.
- What is the meaning of this sign?
- When there is no bandage for rescuing a wounded person, which of the following measures is wrong?
- When rescuing a wounded person suffering from bone fracture, which of the following should be kept in mind?
- How will the adhesive force of road change when speed increases on a damp and slippery road?
- When following other vehicles on a foggy day, what should the driver do?
- When driving on a long downhill road, which is the best way to control driving speed?
- What is the meaning of this sign?
- What is the meaning of this sign?
- What is the meaning of this sign?