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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?
- When there is no bondage for rescuing a wounded person, towels, handkerchiefs, bed sheets and stockings can be used for dressing.
- What is the meaning of this sign?
- What is the meaning of this sign?
- When a motor vehicle temporarily stops at night, which lamp should be turned on?
- 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 the wounded person is suffering main artery bleeding, where should the rescue personnel press by thumb to stop the bleeding?
- What is the main impact of foggy weather on safe driving?
- When encountering a vehicle in front ascending on a mountainous road covered with ice and snow, what should the motor vehicle driver do?
- When a motor vehicle temporarily stops in fog, which lamp should be turned on?
- 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?