920.Write only one instruction in each sentence unless two or more actions occur at the same time( )

17.That portion of the system which is used to distribute high or low pressure air to using

systems Includes items such as ducts, valves, actuators, heat exchangers, controls, etc Does not include the supply valves to the using systems( )

16.Make the surface of the chamfer rough ( )

15.The removal step in the replacement of the hydraulic reservoir might break down( )

14.找到燃油渗漏源( )

13 Do not let the cable touch the floor and make sure the floor is not wet ( )

12.在部件你表面涂上润滑油( )

11.此系统用于伸出或收回起落架( )

10.以数字顺序列出零件编号( )

9.Technical texts often contain long groups of words that have the function of one part of speech in a sentence ( )

8.The time intervals for the inspections vary with the types of aircraft( )