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

Previous question: 26. 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.

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 most frequent problem for driving on a muddy road?
What is the meaning of this sign?
Which of the following method is correct to rescue an unconscious person?
What is the meaning of this sign?
What is the meaning of this sign?
When approaching a vehicle on a narrow slope, which one of the following ways is correct?
When following other vehicles on the uphill section of a mountain road, what should the driver do if the vehicle in front stops?
When the wounded person is suffering main artery bleeding, where should the rescue personnel press by thumb to stop the bleeding?
When rescuing a person sustaining full-body burns the rescue personnel may spray cool water to his body to put out the fire.
Which of the following is an inflammable solid material?
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 fix the wounded part in position, then stop the bleeding and dress the wound.
The wrong method to rescue a poisoned person in a traffic accident is to ______.
When a motor vehicle temporarily stops in fog, which lamp should be turned on?
What is the meaning of this sign?