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124. What influence does smoking have upon driving?
A. Harmful for safe driving
B. Increase concentration
C. Help relaxation
D. No effect on driving
Answer：A
Previous question: 123. Which of the following is a bad habit when changing lanes?
Next question: 125. When driving on a long downhill road, which is the best way to control the speed?
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 a motor vehicle temporarily stops at night, which lamp should be turned on?
- What is the meaning of this sign?
- What is the meaning of this sign?
- When a motor vehicle stops in snow, which lamp should be turned on?
- What is the meaning of this sign?
- What should be checked before driving?
- What is the meaning of this sign?
- 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?
- When rescuing a wounded person suffering spinal fracture, it is necessary to ___________.
- What is the meaning of this sign?
- What is the meaning of this sign?
- What is the meaning of this sign?
- Which of the following measures is incorrect when a motor vehicle stops?
- What is the meaning of this sign?