题目内容
An VOR station is depicted on the sectional chart with circles, called _____________________.
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The VOR provides better accuracy and reliability than NDB because its signals are less ________________________around terrains and suffers less _____________________ from thunderstorms.
VOR stations operate in the VHF band which limits their range to ____________________.
An extensive network of ground stations is need to provide __________________along the main air routes.
“人工智能”(artificial intelligence,AI)这一概念,公认是( )年在达特茅斯会议上被首次提出的。
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