The internal force of any structure is zero if it is not subjected to external loads.

Station lighting, advertising lighting and escalators are all secondary loads.

_____ loads of big oranges on the ground.

重心随着机翼上的载荷而移动。 A: The center of gravity moves in relation to the loads on the wings. B: Movement of the center of gravity is proportional to the loads on the wings. C: Movement of the center of gravity is proportionally the loads on the wings.

重心随着机翼上的载荷而移动。 A: The center of gravity moves in relation to the loads on the wings. B: Movement of the center of gravity is proportional to the loads on the wings. C: Movement of the center of gravity is proportionally the loads on the wings.

重心随着机翼上的载荷而移动。 A: The center of gravity moves in relation to the loads on the wings. B: Movement of the center of gravity is proportional to the loads on the wings. C: Movement of the center of gravity is proportionally the loads on the wings.

重心随着机翼上的载荷而移动。 A: The focal point moves in relation to the loads on the wings. B: Movement of the center of gravity is proportional to the loads on the wings. C: The center of gravity moves in relation to the loads on the wings

重心随着机翼上的载荷而移动。 A: The center of gravity moves in relation to the loads on the wings. B: Movement of the center of gravity is proportional to the loads on the wings. C: Movement of the center of gravity is proportionally the loads on the wings.

The internal force of any structure is zero if it is not subjected to external loads. A: 正确 B: 错误

If the airplane’s longitudinal axis is not parallel to the runway, the landing gear has to suffer additional loads.