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63. What is the meaning of this sign?
A. Bump road
B. Low-lying road
C. High outburst road
D. Hump bridge
Answer：B
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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
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- 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.
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