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[单选题]
舵的类型按舵叶的支承情况分有________。①双支承舵;②多支承舵;③悬挂舵;④半悬挂舵。
A.①②
B.①~③
C.①~④
D.③④
查看答案
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A.①②
B.①~③
C.①~④
D.③④
A.①~③
B.②~④
C.①③④
D.①②④
A.①②
B.①③
C.②③
D.①②③
A.三者偏差不应大于±0.5°,正舵位置偏差不大于±0.1°
B.三者偏差不应大于±1°,正舵位置不应有误差
C.三者偏差不应大于±0.7°,正舵位置偏差不大于±0.2°
D.三者偏差不应大于±0.8°,正舵位置偏差不大于±0.3°