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【多选题】
铺轨基地内，钢轨应分类垛码，其应符合的规定包括（）。A.
钢轨起吊应缓起、轻落并保持钢轨基本平直
B.
钢轨长度应逐根丈量，并测量断面尺寸。不同长度和断面尺寸公差级别的钢轨应分类码垛，并予以标识
C.
每垛钢轨应竖立标牌，标识产地、类型、规格和数量
D.
钢轨应承垫架空，支垫应与钢轨垂直放置，间距5～7.5m
E.
上下层错位布设，保持稳固。垛码层数应使钢轨不伤损变形
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【简答题】The _____________(ener) turtles were protected in a safe environment.
【简答题】a protected, safe place: r_____e
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A.
safe
B.
safely
C.
to safe
D.
to be safe
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A.
the system does not crash due to deadlock occurrence
B.
the system can allocate resources to each process in some order and still avoid a deadlock
C.
the state keeps the system protected and safe
D.
all of the mentioned
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