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31. When an erosive material catches fire, it should not be put out with water cannon.
Answer：Y
Previous question: 30. Once inflammable gas causes a fire disaster, it should be put out with water in good time.
Next question: 32. Dangerous chemicals possess the characteristics of explosion, inflammation, poison, erosion and radiation.
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 should the driver do to follow other motor vehicles on a mountain road?
- What should be done by the driver who intends to overtake but the motor vehicle in front neither reduces its speed nor allows the right of way?
- When rescuing a wounded person in an emergency, it is necessary to firstly stop the bleeding by compression before other methods are taken according to the conditions of bleeding.
- What is the meaning of this sign?
- What is the meaning of this sign?
- What is the meaning of this sign?
- 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.
- The first-aid measure to rescue a poisoned person is to _______.
- When a wounded person suffering burns is thirsty, he may drink a small quantity of slightly salty water.
- When rescuing a person sustaining full-body burns the rescue personnel may spray cool water to his body to put out the fire.
- What is the meaning of this sign?
- When following other vehicles on a foggy day, what should the driver do?
- What is the meaning of this sign?
- What is the meaning of this sign?
- Matches, sulfur and red phosphorus are _________.
- When driving in rain and encountering pedestrians with umbrellas or wearing raincoats, what should be done by motor vehicle drivers in order to yield?