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28. Matches, sulfur and red phosphorus are _________.
A. Explosives
B. Inflammable solid materials
C. Self-igniting articles
D. Oxidizing materials
Answer：B
Previous question: 27. Gun powder, explosives and detonating powder belong to which of the following dangerous chemicals?
Next question: 29. Which of the following is an inflammable solid material?
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 there is bleeding at the bone fracture of a wounded person, the first thing to do is to fix the wounded part in position, then stop the bleeding and dress the wound.
- 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.
- How to ensure safe driving at night?
- When the tire pressure is too low, what will happen if the tire changes its shape in waves and increases in temperature due to fast movement?
- What should be checked before driving?
- How should a motor vehicle follow the other vehicle In front when driving on a road covered with ice and snow?
- When following other vehicles on the uphill section of a mountain road, what should the driver do if the vehicle in front stops?
- When discovering animals crossing the expressway on the highway, the driver should not drastically turn to evade.
- When a motor vehicle temporarily stops in fog, which lamp should be turned on?
- What is the meaning of this sign?
- When evading an emergency, except for being calm what principle should be held by drivers?
- What is the meaning of this sign?
- 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?
- When approaching another vehicle at night, why should the driver alternate between high-and-low-beam at a distance more than 150 meters?