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

When a motor vehicle temporarily stops in fog, which lamp should be turned on?
What is the meaning of this sign?
When a wounded person is under the wheel or cargo, the wrong method is to pull the limbs of the wounded.
When a gas tanker is leaking heavily, 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?
Which one of the following measures is correct when a motor vehicle intends to overtake but the vehicle infront refuses to yield?
Dangerous chemicals possess the characteristics of explosion, inflammation, poison, erosion and radiation.
What is the meaning of this sign?
What is the meaning of this sign?
Which of the following is a bad habit when changing lanes?
What is the meaning of this sign?
When a motor vehicle passes over an overflowing bridge, what should the driver do after stopping and observing closely?
What is the meaning of this sign?
What is the meaning of this sign?
When removing a wounded person suffering spinal fracture, the rescuer should never help the wounded person to walk. He may be carried away with a soft stretcher.