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

When following other vehicles on a foggy day, what should the driver do?
How to reduce speed or stop when driving on a road covered with snow and ice?
What is the meaning of this sign?
What is the meaning of this sign?
When rescuing a wounded person suffering from bone fracture, which of the following should be kept in mind?
When driving on road sections where safe sight distance is affected, such as the top of a ramp, what should drivers do to ensure safety?
When a motor vehicle stops in snow, which lamp should be turned on?
What is the meaning of this sign?
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 bone fracture in the thigh, shank and spine, it is necessary to keep the fracture in position and refrain to move the wounded person.
What is the meaning of this sign?
What is the meaning of this sign?
When following other vehicles on the uphill section of a mountain road, what should the driver do if the vehicle in front stops?
Which of the following measures is incorrect when a motor vehicle stops?
How should lamps be used when a motor vehicle meets an oncoming bicycle on a narrow road or a narrow bridge at night?
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.