题目内容
Lesson 12 Understanding Text A T or F -6The radio signals broadcast by a VOR station are composite, including the station’s identifier, voice, and navigation signal.
查看答案
搜索结果不匹配？点我反馈
更多问题
Lesson 12 Understanding Text A T or F -7VORs signals provide considerably greater accuracy and reliability than NDBs.
To maintain the current airway systems, a great number of VOR ground stations are needed.
Fill in each blank with NO MORE THAN THREE words from the text.To use aircraft as a __________________________, a navigation system is a must need. Today's most popuplar air navigation system is the Very High Frequency ________________________________, or VOR. First developed in the US, it is a _____________________________radio navigation system consisting of many fixed __________________________ and a receiver unit on board. The _______________________it uses ranges from 108 to 117.95 MHz, and its maximum range is 200nm __________________ and 25nm in the terminal area.
当用白光照射光栅时（ ）
微信支付 
支付宝支付