对航材、工具、设备、工作区域等进行清洁，避免油液、保险丝等残留。此项属于下列中的哪一项

41 ALTERNAT IVE

40 批At Turn the clamps to free the pipes

39 ALL PERSONNEL MUST FULLY ( ) THE SAPBTY PRECAUTIONS

38 A The pressure lines divide in different directions,

37 A form of printing shall be used which results in a black image suitable for reproduction.

36 An appropriate warning or note shall be contained in @ach Handbook to inform the operator that a current Handbook is required tobe in the airplane during flight and that it is the operator＇s responsibility to maintain the Handbook in a current status

35 ACCURATE

34 An appropriate warning or note shall be contained in each Handbook to inform the operator that a current Handbook is required to be in the ai rplanelduring flight and that it is the operator＇s responsibility to maintain the Handbook in a current status

33 ABOUT

32 Such inserts in the text shall be short and concise and be used to emphasize important and critical instructions.