问答题
[填空1]主要用来显示飞机起落架、副油箱、炸弹、火箭、导弹等外挂物准备、加载和投放情况。
[填空1]主要用来显示飞机起落架、副油箱、炸弹、火箭、导弹等外挂物准备、加载和投放情况。
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单项选择题
Perils of the sea, such as vessel being stranded or grounded covered in an insurance policy are one kind of ( ).
Perils of the sea, such as vessel being stranded or grounded covered in an insurance policy are one kind of ( ).
A．natural calamities
B．fortuitous accidents
C．general extraneous risks
D．special extraneous risks