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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
- When rescuing a wounded person suffering from bone fracture, which of the following should be kept in mind?
- When a motor vehicle temporarily stops in fog, which lamp should be turned on?
- When driving in thick or extremely thick fog, what should the driver do due to the low visibility in such weather?
- Which of the following method is correct to rescue an unconscious person?
- When driving on a long downhill road, which is the best way to control the speed?
- When two vehicles approach each other on a foggy day, what is the best method of safe driving?
- When approaching another vehicle at night, why should the driver alternate between high-and-low-beam at a distance more than 150 meters?
- What should be checked before driving?
- What is the meaning of this sign?
- 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?
- When rescuing the persons who are losing blood, it is necessary to ______ first.
- What is the meaning of this sign?
- What is the meaning of this sign?
- When following other vehicles on the uphill section of a mountain road, what should the driver do if the vehicle in front stops?
- When rescuing a wounded person who has been poisoned by toxic gas, the first measure is to send him/her to a place with fresh air so that he/she will not continue to be poisoned.
- What is the meaning of this sign?