37.輕型飛機中，無線電頻道和廣播頻道可使用同一支天線係因? (A)兩頻率相近 (B)使用萬向天線 (C)可電子調節天線長度 (D)減少空氣阻力

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.