下面哪些部件用来实现FMGC的功能()
A.MCDU+方向舵配平旋钮
B.FCU+方向舵配平旋钮
C.MCDU+FCU
D.MCDU+FCU+方向舵配平旋钮
参考答案:C
When the seller pays for all charges up to an including the loading of a consignment on board the carrying vessel, the term is ().
A.DDU
B.FCA
C.FOB
D.CIF
数轴上点A的坐标为-2,动点B在数轴上运动,且B点与A点间的距离不超过5,则B点坐标x的值应适合()。
A.x≤3
B.x≥-7
C.|x-2|≤5
D.|x+2|≤5