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.

2024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 2024 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 a wounded person is unable to get off the vehicle by himself, he should be removed from the vehicle so as to avoid a secondary injury.
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.
When rescuing a person sustaining full-body burns the rescue personnel may spray cool water to his body to put out the fire.
Gun powder, explosives and detonating powder belong to which of the following dangerous chemicals?
What is the meaning of this sign?
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.
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.
Which of the following is an inflammable solid material?
When rescuing the persons who are losing blood, it is necessary to ______ first.
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?
Matches, sulfur and red phosphorus are _________.
When carrying the wounded persons in coma or in danger of suffocation, they should lie face up.
When a wounded person suffering burns is thirsty, he should only drink plain boiled water.
When removing a wounded person suffering spinal fracture, the rescuer should never help the wounded person to walk. He may be carried away with a soft stretcher.