题目内容：
Ifa passenger carries any kind of arms, a detector will produce a signal and he will be banned from boarding.
参考答案：
答案解析：
单选题：Ifa passenger carries any kind of arms, a detector will prod
- 题目分类：英语四级
- 题目类型：单选题
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Ifa passenger carries any kind of arms, a detector will produce a signal and he will be banned from boarding.