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

The article that cannot be used to stop bleeding by dressing is _________.
When rescuing a wounded person suffering from bone fracture, which of the following should be kept in mind?
When there is no bandage for rescuing a wounded person, which of the following measures is wrong?
What is the meaning of this sign?
When rescuing a wounded person who has been poisoned by toxic gas, the first measure is to send him to a place where air is fresh so that he will not continue to be poisoned.
When approaching another vehicle at night, why should the driver alternate between high-and-low-beam at a distance more than 150 meters?
Matches, sulfur and red phosphorus are _________.
When a motor vehicle passes over an overflowing bridge, what should the driver do after stopping and observing closely?
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 there is bleeding at the bone fracture of a wounded person, the first thing to do is to keep it in position before stopping the bleeding and dress the wound.
When a wounded person suffering burns is thirsty, he may drink a small quantity of slightly salty water.
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 discovering animals crossing the expressway on the highway, the driver should not drastically turn to evade.
What is the meaning of this sign?
When a gas tanker is leaking heavily, which of the following measures is wrong?
What is the meaning of this sign?