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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
- How should lamps be used when a motor vehicle meets an oncoming bicycle on a narrow road or a narrow bridge at night?
- What is the meaning of this sign?
- Which of the following is a bad habit when changing lanes?
- When a wounded person is under the wheel or cargo, the wrong method is to pull the limbs of the wounded.
- When a motor vehicle temporarily stops at night, which lamp should be turned on?
- What is the meaning of this sign?
- What should be checked before driving?
- When the wounded person is suffering main artery bleeding, where should the rescue personnel press by thumb to stop the bleeding?
- When carrying the wounded persons in coma or in danger of suffocation, they should lie face up.
- When rescuing a wounded person in coma, it is necessary to take warm-keeping measures to prevent heat loss.
- When encountering an obstacle on one side of the road, what should vehicles do as they approach each other?
- What kind of harmful effect will be brought about by continuously using the foot brake on a long downhill road?
- What is the meaning of this sign?
- What influence does smoking have upon driving?
- How should lamps be used when motor vehicle drivers pass through a two-way tunnel?
- When evading an emergency, except for being calm what principle should be held by drivers?