668、维修信息需要不断更新

A. 　 Apply fuel to the steel surfaces.

B. 　 Apply oil to the alloy(合金) surfaces.

C. 　 Apply oil to the steel surfaces

A. 　该词典还提供了一些未经批准的词汇,并举例说明了如何使用替代词汇。

B. 　词典还提供了一些未经批准的单词选项,并举例说明如何使用更改单词。
c、词典还给未经批准的单词提供了选择,并举例说明如何使用未经批准的替代词。

A. 　对损伤及临近区域进行检查

B. 　检查损伤及隔离区域

C. 　对与损伤相连接的区域进行检查

A. 　拆下接合表面漆层周围的转接板。

B. 　去除转接板接合面周围的底漆涂层。

C. 　拆卸转接板来去除接合面周围的面漆。

A. 　The specification gives the symbols for relays, diodes, and other parts of the system.

B. 　The specification gives the requirement for markings on relay, triode and other parts of the system.

C. 　 The specification excludes symbols for relays, diodes, and other system parts.

A. 　用设置开关以重置运行时间。

B. 　用重置按钮以重置运行时间。

C. 　用重置按钮以重置格林威治时问。

A. 　、 At the discretion of the manufacturer, the manual may either be prepared in loose-leaf form with a
durable cover or a permanently bound form

A. 　 If a symbol or device is established for a valve or control, it shall be used for this type of unit throughout
the manual. The symbols used should be shown and identified in legend a block on the schematic diagram.

B. 　 B、 If a symbol or device has been set up to a valve or control, the equipment type will be referred, to as this
symbol or device. throughout the manual. The legend block in the diagram displays or identifies symbols or
device.

C. 　 If symbol or design is specified for a valve or control,this type of device is used throughout the section of
the manual. The symbols used can be found and identified in the legend block cof0the schematic. a

A. 　 contamination of the grease can cause damage to the bearing

B. 　 contamination of the oil can cause damage to the shaft

C. 　 pollution of the grease can cause damage to the axle

A. 　拆除校装销和设备,以阻止控制舵面的自由运动

B. 　拆除校装销,安装能够阻止控制舵面自由移动的设备

C. 　拆除能够阻止控制舵面自由运动的校装销和设备