题目内容
（请给出正确答案）
A、0
B、Pl, top is subjected to tension
C、Pl, bottom is subjected to tension
D、2Pl, top is subjected to tension
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CREATE VIEW VIEW_rcda AS SELECT 工资现状AS 工资，姓名 FROM rcda
执行该语句后产生的视图含有的字段名是( )
A．工资现状、工资、姓名 B．工资现状、工资
C．工资现状、姓名 D．工资、姓名
A、Reciprocal theorem
B、Principle of virtual work
C、Superposition theory
D、Basic principles of force method
In the truss structure shown in the figure (
), the number of members with zero force is:
A、4
B、7
C、8
D、9
A、Axial deformation
B、Rotational deformation
C、Shear deformation
D、Flexural (bending) deformation
A、Pa, right side is subjected to tension
B、Pa, left side is subjected to tension
C、2Pa, right side is subjected to tension
D、2Pa, left side is subjected to tension
A、The displacement of any type of structures subjected to external loads can be obtained by graph multiplication method.
B、When EI=constant, graph multiplication method can be used for arch structures.
C、When graph multiplication method is used, the ordinate yc in the formula is the centroid ordinate of the straight-line bending moment diagram.
D、When graph multiplication method is used, if both bending moment diagrams are straight-line diagrams, the ordinate yc can be taken from either diagram.
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