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49. What is the meaning of this sign?
A. Slippery section
B. Sharp curve
C. Inverse curve
D. Continuous curves
Answer：D
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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
- Which one of the following measures is correct when a motor vehicle intends to overtake but the vehicle infront refuses to yield?
- In emergencies, people¡¯s life safety should always be put in the first place.
- What should be done by the driver who intends to overtake but finds that the vehicle in front is also overtaking?
- What is the meaning of this sign?
- Once inflammable gas causes a fire disaster, it should be put out with water in good time.
- What is the meaning of this sign?
- What should the driver do when he/she encounters an oncoming ambulance in the same lane?
- 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 should motor vehicle drivers do when approaching an oncoming vehicle on a frozen road?
- When carrying the wounded persons in coma or in danger of suffocation, they should lie face up.
- 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.
- When the tire pressure is too low, what can happen when driving at a high speed?
- When rescuing a wounded person suffering spinal fracture, it is necessary to ___________.
- When putting out a fire disaster that gives out erosive steam or poisonous gas, the firefighters should wear gas masks and other related protective articles and should operate from the windward side.
- When rescuing a person sustaining full-body burns the rescue personnel may spray cool water to his body to put out the fire.
- When a motor vehicle temporarily stops at night, which lamp should be turned on?