2. 专升本
  3. With the push of a button, the alarm automatically sends a signal, which gets someone to call and see if the person needs help.

With the push of a button, the alarm automatically sends a signal, which gets someone to call and see if the person needs help.

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问题 With the push of a button, the alarm automatically sends a signal, which gets someone to call and see if the person needs help.
选项
答案按一下按钮，警报器会自动发出信号，就会有人打电话来看是否有人需要帮助。
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