题目内容：
甚高频通信设备、高频通信设备、语音通信交换系统、自动转报系统、数据通信网设备、卫星网设备、仪表着陆系统、全向信标、测距设备、无方向性信标、雷达设备和自动化系统每几年至少进行一次巡检：( )A.1
B.2
C.3
D.4
参考答案：
选择题：甚高频通信设备、高频通信设备、语音通信交换系统、自动转报系统、数据通信网设备、卫星网设备、仪表着
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投产校验的申请由中国民用航空地区空中交通管理部门在执行日期( )周前向飞行校验机构提出,并报中
A user downloads a 4.1 GB ISO image from a website. Which of the following media types isrequired for the user to burn the image?()
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