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 _________.

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

What is the meaning of this sign?
When rescuing a person sustaining full-body burns the rescue personnel may spray cool water to his body to put out the fire.
Matches, sulfur and red phosphorus are _________.
What is the meaning of this sign?
When rescuing a wounded person suffering spinal fracture, it is necessary to ___________.
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.
What is the meaning of this sign?
What should be done by the driver who intends to overtake but finds that the vehicle in front is also overtaking?
The first-aid measure to rescue a poisoned person is to _______.
When encountering a vehicle in front ascending on a mountainous road covered with ice and snow, what should the motor vehicle driver do?
What is the meaning of this sign?
What is the meaning of this sign?
When a motor vehicle stops temporarily in a rainy day,which lamp should be turned on?
What is the meaning of this sign?
When a motor vehicle passes over an overflowing bridge, what should the driver do after stopping and observing closely?