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 rescuing the persons who are losing blood, it is necessary to ______ first.
When discovering animals crossing the expressway on the highway, the driver should not drastically turn to evade.
When a motor vehicle temporarily stops in fog, which lamp should be turned on?
What is the most frequent problem for driving on a muddy road?
How should lamps be used by the motor vehicle driver who follows a vehicle on a road section at night where he street light condition is good?
What is the meaning of this sign?
What needs attention when a motor vehicle drives on a road covered with ice and snow?
What is the meaning of this sign?
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?
What is the meaning of this sign?
What is the meaning of this sign?
When a wounded person suffering burns is thirsty, he may drink a small quantity of slightly salty water.
What is the meaning of this sign?
What is the meaning of this sign?
What is the meaning of this sign?
What is the meaning of this sign?