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 is the meaning of this sign?
Once inflammable gas causes a fire disaster, it should be put out with water in good time.
What should the driver do when he/she encounters an oncoming ambulance in the same lane?
When rescuing a wounded person in an emergency, it is necessary to firstly stop the bleeding by compression before other methods are taken according to the conditions of bleeding.
When a wounded person suffering burns is thirsty, he may drink a small quantity of slightly salty water.
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 rescuing a wounded person suffering from bone fracture, which of the following should be kept in mind?
What is the meaning of this sign?
What is the most frequent problem for driving on a muddy road?
When a motor vehicle stops in snow, which lamp should be turned on?
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 approaching a vehicle on a narrow slope, which one of the following ways is correct?
When a motor vehicle passes over an overflowing bridge, what should the driver do after stopping and observing closely?
When the tire pressure is too low, what will happen if the tire changes its shape in waves and increases in temperature due to fast movement?
What is the meaning of this sign?