870.Make sure that the sealant does not cause a blockage of the drain( )

68.因此,词组中的单词越多,理解起来就越困难 ( )

67.Ream the hole 020 inch larger than the standard ( )

66.Turn the cover until you can get access to the jacks that have + and - marks ( )

65.Move the cable strands apart ( )

64.Lifting and shoring part includes procedures covering maintenance , overhaul and repair removal and replacement, as well as abnormal conditions such as belly landing, nose landing

63.Regardless of method used, any publication conforming to the GAMA format will use the same basic numbering system( )

62.The metal has a layer of plastic on it to prevent corrosion( )

61.灰尘会污染所有的滤芯 ( )

60.These tests shall be self-contained ( )

59.其他信息可能会显示在封面上( )