503.Existing analyses were reviewed to identify components and areas that
may have exhibited lower margins of safety.

　Analyses were checked to identify available components and areas where
exhibited lower margins of safety may exists.

　To identify components and areas that may have exhibited lower marbins
of safety,in hand analyses were checked.

　To identify in hand components and areas,analyses were checked where
exhibited lower margins of safety may exists.

正确答案：B

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269.High-time airplanes, disassembled for major overhaul, were inspected
to assist in selecting inspection items.

268.确保孔的直径小于规定值。

267.When the selector is in the 100% position, the user will( ) pure
oxygen.

266.If the pressure supply stops, cancel the test.

265.如果风速高得危险,请不要打开货舱门。

264.如果套筒连接不正确,则需进行调整。

263.That continues to be the same, without change.

262.Except for fold out pages and start of chapters,all pages shall be
printed on both sides.

261.The manufacturer may establish procedures to provide feedback ( ) on
unairworthy conditions ( ) that
were discovered when complying.

260.Make sure that the arrow points in the direction of the fuel flow.

503.Existing analyses were reviewed to identify components and areas thatmay have exhibited lower margins of safety.