40. At the scene of a traffic accident, once there is a leakage of toxic and harmful substances, people must be evacuated at the first time and alarmed immediately.

Answer：Y

Previous question: 39. The wrong method to rescue a poisoned person in a traffic accident is to ______.

Next question: 41. When rescuers enter the scene to rescue the wounded after harmful gas leakage caused by traffic accidents, they must wear air respirators or cover their mouth and nose with wet towels.

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 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 suffering spinal fracture, it is necessary to ___________.
When a motor vehicle encounters a burning phenomenon, it should leave the vehicle quickly so as not to cause injury or asphyxia to the respiratory tract.
What is the meaning of this sign?
What is the meaning of this sign?
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?
What is the meaning of this sign?
The first-aid measure to rescue a poisoned person is to _______.
What is the meaning of this sign?
How to ensure safe driving at night?
What is the meaning of this sign?
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.
When a wounded person is under the wheel or cargo, the wrong method is to pull the limbs of the wounded.
What is the meaning of this sign?