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

Which of the following is a bad habit when changing lanes?
When rescuing the persons who are losing blood, it is necessary to ______ first.
What is the meaning of this sign?
What is the most frequent problem for driving on a muddy road?
When approaching another vehicle at night, why should the driver alternate between high-and-low-beam at a distance more than 150 meters?
When rescuing a wounded person suffering from bone fracture, which of the following should be kept in mind?
When rescuing a wounded person who has been poisoned by toxic gas, the first measure is to send him/her to a place with fresh air so that he/she will not continue to be poisoned.
When two vehicles approach each other on a foggy day, what is the best method of safe driving?
When a wounded person suffering burns is thirsty, he should only drink plain boiled water.
Which of the following is an inflammable solid material?
What is the meaning of this sign?
What is the meaning of this sign?
Rescue personnel should check the breath of the unconscious person before applying any other emergency treatment.
When an erosive material catches fire, it should not be put out with water cannon.
What is the meaning of this sign?
When a motor vehicle stops in snow, which lamp should be turned on?