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.

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?
What is the meaning of this sign?
What is the meaning of this sign?
Once inflammable gas causes a fire disaster, it should be put out with water in good time.
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?
Which of the following is an inflammable solid material?
What is the meaning of this sign?
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 discovering animals crossing the expressway on the highway, the driver should not drastically turn to evade.
What is the meaning of this sign?
What is the main impact of foggy weather on safe driving?
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.
When a wounded person suffering burns is thirsty, he should only drink plain boiled water.
What is the meaning of this sign?