109.方向舵配平显示窗中显示”L19.7”表示: Rudder balancing display in the window “L19.7”, means:

　方向舵向右配平19.7O. The rudder balancing 19.7 O to the right

　方向舵向左配平19.7O. The rudder balancing 19.7 O to the left

　方向舵的角度是19.7O. The rudder Angle is 19.7 O.

正确答案：B

解析：

方向舵配平显示窗中显示”L19.7”表示: 答案:B 题目解析: 这道题考察的是对方向舵配平显示窗中数值的理解。"L19.7" 表示左侧方向舵的配平值为19.7单位。在飞机的配平系统中，通常使用负值表示向左配平，正值表示向右配平。因此，"L19.7" 表示方向舵向左配平19.7单位。

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