题目详情
单选题 Which of the following best describes the function of the 'helium gas cylinder' mentioned in Article 2
A. It keeps the collar fashionable
B. It improves the user's visibility while cycling
C. It inflates the airbag quickly
D. It helps the collar stay dry in the rain

学科:默认课程
时间:2025-09-24 13:39:58
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