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【简答题】
液压油被污染的原因有哪些?
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反馈参考答案：
举一反三
【简答题】某现象的某一指标在同一时间不同空间上的指标对比的结果是_____;在同一空间不同时间上的指标值对比的结果是_________;同质总体中部分数值与总体全部数值对比的结果是______;各部分数值相对比的结果是_____。
【单选题】For three element number(XX-XX-XX), the first element is ().
A.
chapter number
B.
section number
C.
subject number
D.
page number
【简答题】某现象的某一指标在同一时间不同空间上的指标值对比的结果是（），在同一空间不同时间上的指标值对比的结果是（）。
【多选题】What are the three necessary element used to describe a crisis?
A.
huge death toll 2016
B.
a triggering event causing or having the potential to cause significant change
C.
the perceived inability to cope with this change
D.
a threat to the existence of the organization
【单选题】For three element number(XX-XX-XX), the third element is ().
A.
chapter number
B.
section number
C.
subject number
D.
page number
【单选题】For three element number(XX-XX-XX), the second element is ().
A.
chapter number
B.
section number
C.
subject number
D.
page number
【简答题】有利于产生降水的高低空天气系统有( )、 ( )、( )、( )、( ) 、( ) 等 。
【单选题】The general three-dimensional state of stress at a point can be represented by an element oriented so that only ( ) act on it.
A.
three principal stresses
B.
two principal stresses and one shear stress
C.
six principal stresses
D.
three absolute maximum shear stresses
【简答题】An alkaline earth element is radioactive. It and its daughter elements decay by emitting three alpha particles in succession. In what group should the resulting element be found?
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