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

What is the meaning of this sign?
When driving in rain and encountering pedestrians with umbrellas or wearing raincoats, what should be done by motor vehicle drivers in order to yield?
What influence does smoking have upon driving?
What should motor vehicle drivers do when approaching an oncoming vehicle on a frozen road?
What is the meaning of this sign?
What is the meaning of this sign?
When there is no bandage for rescuing a wounded person, which of the following measures is wrong?
When driving on a long downhill road, which is the best way to control driving speed?
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?
When the wounded person is suffering main artery bleeding, where should the rescue personnel press by thumb to stop the bleeding?
What kind of harmful effect will be brought about by continuously using the foot brake on a long downhill road?
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.
What is the meaning of this sign?
What is the meaning of this sign?
What is the meaning of this sign?