Directions: Complete the following sentences with the proper words you learned. 1. The g______ lock must be removed before departure. 2. High speed at t_______ may cause damage to the structure of the aircraft. 3. Our aircraft was struck by h_____ and the windshield was crazed. 4. They were caught by d______ and lost altitude. 5. L______ strike poses a threat to safety. 6. C_____ is the greatest height an aircraft can fly at or the level of the clouds. 7. T______ are most common during hot summer afternoons when winds are light or in coastal areas at night. 8. If sufficient m_____ is present, heat released by the condensing vapor ( 冷凝汽 )provides energy for the continued vertical growth of the cloud. 9. Thunderstorms can pose a threat to aircraft, particularly in the stormy summer months, mainly because of the c__________ motion of the air within storms. 10. We encountered severe turbulence and request emergency d______ to 7200 m. 11. Trim tabs are small, movable portions of the t________ edge of the control suce. 12. An aircraft entering a tornado v_________ is almost certain to suffer loss of control and structural damage. 13. Drag is the force that resists movement of an aircraft through the air. There are two basic types: parasite drag and i______ drag. 14. Operating above the maximum weight limitation compromises the structural i_______ of the aircraft and can adversely affect performance. 15. The actual location of the CG can be altered by many v_______ factors and is usually controlled by the pilot.