16.若附有尾旋翼之直昇機停懸時，方向控制是 (A)傾斜旋轉面至想要的方向 (B)增加尾旋翼轉速 (C)減少尾旋翼轉速 (D)改變尾旋翼片攻角

5. If an aircraft is operating at 40,000 ft. the pressurization ensures that (A)sea level pressure is maintained in the cabin. (B)the cabin pressure is progressively increased until the operational height is reached. (C)the cabin pressure above 10,000 ft. (D)the cabin pressure is equivalent to an altitude of less than 10,000 ft.