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

Once inflammable gas causes a fire disaster, it should be put out with water in good time.
When an erosive material catches fire, it should not be put out with water cannon.
What is the meaning of this sign?
When discovering animals crossing the expressway on the highway, the driver should not drastically turn to evade.
When using splints, sticks or tree branches to keep the unexposed bones in position, it is necessary that these things should exceed the upper and lower joints of the wound.
When there is no bandage for rescuing a wounded person, which of the following measures is wrong?
Which of the following is an inflammable solid material?
When a motor vehicle encounters an accident, the driver should pay attention to whether there is fuel leakage, pipeline rupture, so as avoid accidents.
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.
When rescuing a wounded person suffering from bone fracture, which of the following should be kept in mind?
The drivers, loaders and supercargoes responsible for dangerous chemicals transportation should all full understand the chemical characteristics, potential risks, features of the packaging containers and emergency measures for any unexpected accidents.
When rescuing the injured, it is necessary to ________.
Which of the following measures is correct for rescuing a person sustaining full-body burns?
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.
The first-aid measure to rescue a poisoned person is to _______.
In emergencies, people¡¯s life safety should always be put in the first place.