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

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.
When an erosive material catches fire, it should not be put out with water cannon.
When rescuing a person sustaining full-body burns the rescue personnel may spray cool water to his body to put out the fire.
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.
When a wounded person suffering burns is thirsty, he should only drink plain boiled water.
Gun powder, explosives and detonating powder belong to which of the following dangerous chemicals?
When rescuing a wounded person suffering from bone fracture, which of the following should be kept in mind?
When a wounded person suffering burns is thirsty, he may drink a small quantity of slightly salty water.
When a gas tanker is leaking heavily, which of the following measures is wrong?
Which of the following is an inflammable solid material?
When the wounded person is suffering main artery bleeding, where should the rescue personnel press by thumb to stop the bleeding?
When rescuing a wounded person in coma, it is necessary to take warm-keeping measures to prevent heat loss.
When rescuing a wounded person suffering spinal fracture, it is necessary to ___________.
The article that cannot be used to stop bleeding by dressing is _________.
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.
What is the meaning of this sign?