题目内容

CRS旋钮控制由显示控制板上的CESACT或CRSPRE按钮和SEL/ENG旋钮选定的导航传感器的航道指针,如果电源丧失或断开系统则:

A. 选定的航道值会自动消失
B. 选定的航道值已经升效
C. 选定的航道值会存储起来
D. 选定的航道值会选为备用

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