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【单选题】
在一定的观测条件下偶然误差的（）不会超过一定的限度。A.
误差值
B.
相对值
C.
平均值
D.
绝对值
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举一反三
【单选题】资产负债表日,其他债权投资的公允价值高于其摊余成本的差额时,会计处理为,借记“其他债权投资”科目,贷记( )科目
A.
其他综合收益
B.
投资收益
C.
资产减值损失
D.
公允价值变动损益
【简答题】Compute the mass fractions of ferrite and cementite in pearlite.
【单选题】The austenite to pearlite transformation is essentially the decomposition of austenite into almost pure ferrite and ().
A.
bainite
B.
cementite
C.
martensite
D.
pearlite
【简答题】Pearlite can be subdivided into , andaccording to layer thickness of the lamination.
【判断题】Transformation temperature of fine pearlite is lower than that of coarse pearlite.
A.
正确
B.
错误
【单选题】The thickness ratio of the ferrite and cementite layers in pearlite is approximately ( ).
A.
8 to 1
B.
6 to 1
C.
5 to 1
D.
4 to 1
【简答题】Thethickness ratio of the ferrite and cementite layers in pearlite isapproximately ( ).A. 8to 1B. 6to 1C. 5to 1D. 4to 1
【单选题】Pearlite is a two-phased, lamellar structure composed of alternating layers of ().
A.
ferrite and cementite
B.
austenite and cementite
C.
austenite and ferrite
D.
liquid and cementite
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