77. Main engine can be turned by turning gear only when the access doors are opened.
选项:
A:
A: Main engine can't be turned unless the access door is opened.;
B:
B: Only the access door can be turned.;
C:
C: Main engine can't be turned even when you open the access door. ;
D:
D: Main engine can be turned without opening the access door.
发布时间:2024-04-24 13:59:31