531.To give or send signals that adjust, operate, or keep something to
a limit,or that cause something to operate.

A. 　To include a relocated chapter table of contents is not required if the
total chapter has been relocated, while the subsystem relocations should
then be identified in the Table of Contents at the front of the book.

B. 　On conditional that the total chapter has been relocated, to include
a relocated chapter table of contents is not important,then the subsystem
relocations should then be identified in the Table of Contents at the front
of the book.

C. 　If the total chapter has been relocated, it is not forced to contain
a relocated chapter table of contents, and the subsystem relocations
should then be identified in the Table of Contents at the front of the
book.

A. 　如果不正确跟进操作程序、检查、修理或维护程序,可能导致人员受伤。

B. 　如果没有紧跟操作程序、检查、修理或维护程序,可能导致人员伤亡。

C. 　如果不正确遵循操作程序、检查、修理或维护程序,可能导致人员伤亡。

A. 　Documents must be temporarily edible.

B. 　Documents must be readily revisable.

C. 　Documents must be permanently durable.

A. 　 does not permitted to

B. 　 not permitted to do

C. 　 permit to do

A. 　Space permitting, legends shall be spelled out within the diagram rather
than abbreviated or keyed by numerals to a list of legends at the bottom
or on an adjacent page.

B. 　Where Space permits, legends should be illustrated in forms,rather than
briefed or typed in legend lists at the bottom or on adjust pages.

C. 　Space permitting, legends have to be explicited within the chat rather
than syncopated or keyed by numbers to a list of legends at the bottom
or on an adjacent page.

A. 　VARY

B. 　CHANGE

C. 　CONSTANT

A. 　目录页必须注明日期,但无需编号。

B. 　目录页需要注明日期,但不用编号。

C. 　目录页应该注明日期,但不用编号。

A. 　KEEP

B. 　HOLD

C. 　MAINTAIN

A. 　ACCELERATES

B. 　AGGRAVATES

C. 　INCREASES