尔雅Structural Mechanics I答案(学习通2023课后作业答案)
尔雅Structural Mechanics I答案(学习通2023课后作业答案)
Unit testing of chapter 2
1、尔雅The答案 system removed any one of its support link is a geometrically stable system with no redundant constraints.
A、
B、学习
C、通课
D、后作
2、业答The尔雅 number of redundant constraints in the system is （）
A、1
B、答案2
C、学习3
D、通课4
3、后作The业答 geometric construction of the system as the figure shown is （）
A、Geometrically stable system without redundant constraints
B、尔雅Geometrically stable system with redundant constraints
C、答案Constantly changeable system
D、学习Geometrically instantaneously unstable system
4、The geometric construction of the system as the figure shown is （）
A、Geometrically stable system without redundant constraints
B、Geometrically stable system with redundant constraints
C、Constantly changeable system
D、Geometrically instantaneously unstable system
5、The hinge A can move in vertical direction in the system as the figure shown, which means that the length of member AB and AC can change but keeping in equal. The position of other joints can’t be changed. If the structure is a stable system, which of the following is correct.
A、h≠2m
B、h≠4m
C、h≠4m or h≠∞
D、h≠2m or h≠∞
6、The geometric construction of the system as the figure shown is （）
A、Geometrically stable system without redundant constraints
B、Geometrically stable system with redundant constraints
C、Constantly changeable system
D、Geometrically instantaneously unstable system
7、The geometric construction of the system as the figure shown is ()
A、Geometrically stable system without redundant constraints
B、Geometrically stable system with redundant constraints
C、Constantly changeable system
D、Geometrically instantaneously unstable system
8、The geometric construction of the system as the figure shown is ()
A、Geometrically stable system without redundant constraints
B、Geometrically stable system with redundant constraints
C、Constantly changeable system
D、Geometrically instantaneously unstable system
9、The geometric construction of the system as the figure shown is ()
A、Geometrically stable system without redundant constraints
B、Geometrically stable system with redundant constraints
C、Constantly changeable system
D、Geometrically instantaneously unstable system
10、The geometric construction of the system as the figure shown is ()
A、Geometrically stable system without redundant constraints
B、Geometrically stable system with redundant constraints
C、Constantly changeable system
D、Geometrically instantaneously unstable system
11、The geometric construction of the system as the figure shown is ()
A、Geometrically stable system without redundant constraints
B、Geometrically stable system with redundant constraints
C、Constantly changeable system
D、Geometrically instantaneously unstable system
12、The geometric construction of the system as the figure shown is ()
A、Geometrically stable system without redundant constraints
B、Geometrically stable system with redundant constraints
C、Constantly changeable system
D、Geometrically instantaneously unstable system
13、The geometric construction of the system as the figure shown is ()
A、Geometrically stable system without redundant constraints
B、Geometrically stable system with redundant constraints
C、Constantly changeable system
D、Geometrically instantaneously unstable system
14、The geometric construction of the system as the figure shown is ()
A、Geometrically stable system without redundant constraints
B、Geometrically stable system with redundant constraints
C、Constantly changeable system
D、Geometrically instantaneously unstable system
15、The geometric construction of the system as the figure shown is ()
A、Geometrically stable system without redundant constraints
B、Geometrically stable system with redundant constraints
C、Constantly changeable system
D、Geometrically instantaneously unstable system
16、The geometric construction of the system as the figure shown is ()
A、a stable system with no redundant constraints
B、. a stable system with redundant constraints
C、an unstable system which can deform randomly
D、an instantaneously unstable system
17、The geometric construction of the system as the figure shown is ()
A、Geometrically stable system without redundant constraints
B、Geometrically stable system with redundant constraints
C、Constantly changeable system
D、Geometrically instantaneously unstable system
18、If the computing degrees of freedom W of a planar system is greater than 0, it is impossible to be a geometrically stable system.
19、If the computing degrees of freedom W of a planar system is less than 0, the system must be a statically indeterminate structure.
20、Three rigid bodies connected by three hinges pairwisely form a geometrically stable system without redundant constraints.
21、Two links connecting two rigid bodies can be equivalently replaced by a virtual hinge
22、Several simple geometric construction rules of geometric stable system can be attributed to one basic rule: the basic triangle rule.
Week 4
Unit testing of chapter 4
1、The shear force of section K in the structure is （）.
A、-F
B、-F/2
C、0
D、F
2、The free body diagram of member AB in a structure is shown in the figure. The shape of its bending moment diagram is ().
A、
B、
C、
D、
3、As shown in the figure MA=______, MC=______。（When the lower side is in tension, the bending moment is positive ）
A、Fa；Fa
B、-Fa；-Fa
C、Fa；-2Fa
D、-2Fa；Fa
4、The bending moment diagram of a simply supported beam is shown in the figure. Segment AB is a quadratic parabola and the bending moment at section B is 2kN·m. The slope has no mutation, and the bending moment diagram of segment BC is an oblique line. Then the external loads on the beam is shown in ( ) .
A、
B、
C、
D、
5、The bending moment diagram of a rigid frame is shown in the figure. The bending moment of member AB is a quadratic parabola, so the load on the structure is ( ). (Please answer the size, direction and action of the load)
A、
B、
C、
D、
6、The bending moment diagram of a rigid frame is shown in the figure, from which it can be judged that this rigid frame is only under the action of a horizontal concentrated load at point E, with a direction to the right and a size of 10kN .
7、The bending moment diagram of a simply supported beam is shown in figure(a), where AB segment is a quadratic parabola, BC segment is a horizontal line, and the bending moment value at B has no mutation, so its shear force diagram is shown in figure (b).
8、As shown in the figure, the internal forces of member ABC are the same in the three structures .
9、Figure (a) is the free body diagram of a member AB taken from a structure, then its bending moment diagram is shown in figure (b) .
10、The internal force of any structure is zero if it is not subjected to external loads.
11、As shown in the figure, the superposition method is not applicable to the bending moment diagram of member BC.
12、The reaction of support D is ____ kN (↑).
13、The bending moment of section B is _____kN·m (lower side in tension is positive).
14、As shown in the figure, the full length of the statically determinate multi-span beam is subject to uniform distribution load q, and the span length is l. If the absolute value of the maximum positive and negative bending moments on the beam are the same (the bending moment is positive if the lower side is in tension.), the distance x between hinge B and support C is ______ l (the result remains 2 decimal places) .
15、Given the bending moment of a continuous beam, as shown in the figure, the support reaction at B is FRB=____kN .(the result remains 1 decimal places)
Week 6
Unit testing of chapter 6
1、The number of zero force members (including bearing links) in the truss shown in the figure is ( ) .
A、9
B、10
C、11
D、12
2、The number of zero force members (excluding bearing links) in the truss shown in the figure is ( ) .
A、BE、AE、CE
B、BE、AE、CG
C、BE、AB、BC
D、BE
3、As shown in the figure, the axial force of the member BD is ( )
A、0
B、√2qa
C、-√2qa/2
D、-2√2qa
4、As shown in the figure, which of the following is true （ ）
A、The structure is a truss.
B、The structure is a composite structure in which only member 57 is two-force member (truss member).
C、Only member 34 has bending moment.
D、All members except member 123 are truss members.
5、The axial force of member1 as the figure shown is ( )
A、-F/4
B、F/4
C、-F
D、0
6、As shown in the figure, the axial force of rod 1 of the truss is ___ kN, the axial force of the 2 bar is ___ kN。（keep it to two decimal places）
A、56.57；-28.28
B、56.57；28.28
C、-56.57；-28.28
D、-56.57；28.28
7、As shown in the figure, the axial force of member 1 of the truss is ___ F, and the axial force of member 2 is ___ F.（keep it to two decimal places）
A、-2.24；-2.24
B、-2.24；2.24
C、2.24；2.24
D、2.24；-2.24
8、As shown in the figure, the axial force of member 1 of the truss is ___ kN; The axial force of member 2 is ___ kN, and the axial force of member 3 is ___ kN.
A、62.5 ,-75 , 0
B、62.5 , 75 , 0
C、-62.5 , 0 , -75
D、62.5 , 0 , 75
9、As shown in the figure, the axial force of member 1 of the truss is ___ P; The axial force of member 2 is ___ P.（keep it to two decimal places）
A、-1.06 ,- 0.25
B、1.06 , 0.25
C、-1.06 , 0.25
D、1.06 , -0.25
10、As shown in the figure, the axial force of member 3 is ___ P, and the axial force of member 4 is ___ P.（keep it to two decimal places）
A、0.71 , -1.25
B、-0.71 , -1.25
C、0.71 , 1.25
D、-0.71 , 1.25
11、As shown in the figure, the axial force of member 1 of the truss is ___ P; The axial force of member 2 is ___ P, and the axial force of member 3 is ___ P.（keep it to two decimal places）
A、-2.50 , -0.83 , 3.00
B、-5, -0.83 , 3.00
C、-2.50 , -0.83 , 6.00
D、2.50 , -0.83 , 3.00
12、As shown in the figure, the axial force of member 1 of the truss is ___ kN; The axial force of member 2 is ___ kN (keep it to two decimal places).
A、20 , -14.14
B、-20 , -14.14
C、20 , 14.14
D、-20 , 14.14
13、As shown in the figure, the axial force of member 1 of the truss is ___ P, the axial force of member 2 is ___ P.(keep it to three decimal places)
A、-0.125 , 1.875
B、0.125 , 1.875
C、-0.125 , -1.875
D、0.125 , -1.875
14、As shown in the figure, the axial force of member 1 of the truss is ___ P; The axial force of member 2 is ___ P, and the axial force of member 3 is ___ P(keep it to two decimal places).
A、-0.79 , 1.33 , -1.74
B、-1.58 , 2.66 , -3.48
C、0.79 , 1.33 , -1.74
D、1.58 , 2.66 , -3.48
15、As shown in the figure, the axial force of member 1 of the truss is ___ kN; The axial force of member 2 is ___ kN, and the axial force of member 3 is ___ kN. (keep it to two decimal places)
A、56.56 , -40.00 , -141.42
B、28.28 , -20.00 , -70.71
C、-56.56 , -40.00 , -141.42
D、-28.28 , -20.00 , -70.71
16、As shown in the figure, the axial force of member 1 of the truss is ___ qa, and the axial force of member 2 is ___ qa.(keep it to two decimal places)
A、1.50 , -2.12
B、-1.50 , -2.12
C、1.50 , 2.12
D、-1.50 , 2.12
17、An actual truss has only axial forces, no bending moments and shear forces.
18、As shown in the figure, the system is a statically determinate structure 。
19、In the structure shown in the figure, under the action of temperature change, all the binding forces (support reaction, mutual binding between the members, internal force of the bar section) are zero, the set of answers meets the equilibrium condition, so is to determine the solution.
20、For the three structures shown in figure (a), (b) and (c), the order of the maximum bending moment (absolute value) of the beam is:(a) > (b) > (c).
21、There are zero orce members in the truss. (excluding support links) .
22、There are zero force members in the truss. (excluding support links)
23、There are zero force members in the truss. (excluding support links)
24、As shown in the figure, the axial force of member AE of the truss is ___ 。
Week 7
Unit testing of chapter 7
1、By comparing the deflection yC and bending moment MC of point C under the action of different factors of the same structure as shown in figure (a) and figure (b), which of the following conclusions is true ?
A、yC is equal, MC is equal
B、yC is equal, MC is not equal
C、yC is not equal, MC is equal
D、yC is not equal, MC is not equal
2、As shown in the figure, which of the following is true ?
A、FRC = F’RC = 0
B、FRC = 0, F’RC ≠ 0
C、FRC ≠ 0, F’RC ≠ 0
D、FRC ≠ 0, F’RC = 0
3、As shown in the figure, which of the following is true?
A、FRC = F’RC = 0
B、FRC = 0, F’RC ≠ 0
C、FRC ≠ 0, F’RC ≠ 0
D、FRC ≠ 0, F’RC = 0
4、As shown in the figure, the vertical reaction at support A is 0.
5、As shown in the figure, the bending moment of member AB is zero.
6、Comparing the two different loads on the same structure as shown in figure (a) and figure (b), it can be known that the bending moments of all parts are exactly the same, except for the different bending moments of section CD.
7、As shown in the figure, bending moment at section C of member AC MCA=_______。（ The bending moment is positive when its inner side is in tension ）
Week 8
Unit testing of chapter 8-1
1、Assume that the horizontal displacement of joint K is Δ under the action of loads. If the EI of member NK is reduced to EI/2, the horizontal displacement of joint K becomes ( ) .
A、Δ
B、1.5Δ
C、2Δ
D、3Δ
2、The horizontal displacement of point M for the frame is equal to 0.
3、The horizontal displacement of point M for the frame is equal to 0.
4、The following two structures have the same EA for each member, and the vertical displacements of point C for two structures are same.
5、The vertical displacement of the joint K for the frame is Δ . If the stiffness of each member is reduced by half, the vertical displacement of point K is( )Δ（↓）
6、The rigid frame is subjected to loads as the figure shown. The relative linear displacement of section M and N is equal to( )FPl3/EI （← →）.（keep it to one decimal places）
7、The structure is subjected to a moment M as the figure shown.EI is a constant. The vertical displacement of section K is（）Ml2/EI （↓）.
Week 9
Unit testing of chapter 8-2
1、One of the necessary conditions for using the method of graph multiplication is ( ) .
A、the bending moment diagram is a straight line under unit load
B、the structure can be divided into straight members with uniform section
C、the flexural rigidity EI of all members is a constant and equal
D、a structure must be a statically determinate structure
2、The EI of each member for a rigid frame is a constant as shown in the figure. The clockwise angle of the section N is ( ) .
A、Pl2/6EI
B、Pl2/3EI
C、-Pl2/6EI
D、-Pl2/3EI
3、The EI of the structure is a constant. If the horizontal displacement of the point K is zero, P1/P2 should be ( ) .
A、10/3
B、9/2
C、20/3
D、17/2
4、In the figure, the linear elastic beam is firstly loaded with F1 , and the deflections of point A and point B are Δ1 and Δ2 respectively . Then continue to load force F2 ， the deflection of point A and point B increases by Δ1' and Δ2' respectively. The total work done by force F1 is（ ）.
A、F1 Δ1/2
B、F1（Δ1+Δ1'）/2
C、F1（Δ1+Δ1'）
D、F1Δ1/2 +F1Δ1'
5、Four reciprocal laws are all applicable to ( )
A、The rigid body
B、Deformable body
C、Linearly elastic system
D、Nonlinear system
6、As shown in the figure, in order to make the vertical displacement of structure (a) at point 1 twice that of structure (b) at point 2, it is necessary to: （）
A、P2=0.5P1
B、P2=P1
C、P2=2P1
D、P2=-2P1
7、As shown in the figure, according to the law of reciprocal reactions, r12=r21, then the dimension of r12 and r21 is ( )
A、force
B、dimensionless
C、force/length
D、length/force
8、As shown in the figure, the relationship between the rotation φ and the vertical displacement δ of the beam is ( ).
A、φ = δ
B、it depends on the flexural rigidity of the beam
C、φ > δ
D、φ < δ
9、The method of graph multiplication could be applied to any straight member structure.
10、The graph multiplication result of the following two internal force diagrams is 0.
11、Statically determinate structures must have internal forces if they have deformation.
12、Statically determinate structures must have deformation if there is displacement.
13、The reciprocal law of work is only applicable to elastic systems.
14、The law of reciprocal displacements is that the displacement caused by the second force in the direction of the first force is equal to the displacement caused by the first force in the direction of the second force.
15、In the law of reciprocal displacements, the reciprocal relationship between the line displacement and the rotation can be established : δ12=φ21, δ12 and φ21 are just equal in value but of different dimensions.
16、The following figures show two states of a beam. The virtual work done by external load FP1 of state I is T12 (T12 =FP1Δ21). It equals the virtual work T21 ( T21 =FP2Δ12 ) of external load FP2 of state II.
Midterm Exam
Midterm Exam
1、The geometric construction of the system as the figure shown is （ ）.
A、A stable system with no redundant restraints;
B、A stable system with redundant restraints;
C、A constantly changeable system;
D、An instantaneously unstable system.
2、The geometric construction of the system as the figure shown is （ ）.
A、A stable system with no redundant restraints;
B、A stable system with redundant restraints;
C、A constantly changeable system;
D、An instantaneously unstable system.
3、In the figure, the moment provided by support A is （ ）
A、60kN?m， lower side in tension
B、60kN?m， upper side in tension
C、20kN?m， lower side in tension
D、20kN?m，upper side in tension
4、If the diagram is a bending moment diagram of member AB, the shear force diagram is （ ）.
A、
B、
C、
D、
5、The figure shows a beam subjected to an external couple. The bending moment diagram should be （ ）.
A、
B、
C、
D、
6、The rational axial line of a three-hinged arch under downward vertical uniformly distributed load is （ ）.
A、Second-degree parabola
B、Catenary
C、Hyperbola
D、Cosine curve
7、When establish a virtual work equation, the relationship between force state and displacement state is （ ）.
A、Independent of each other
B、The displacement state must be generated by the force state.
C、Mutual causation
D、The force state must be caused by the displacement state.
8、If a rigid frame has a downward displacement a and a rotation angle α of the support A , the vertical displacement of the section B is（ ）.
A、related to h, l and EI.
B、only related to h and l.
C、only related to l.
D、only related to EI.
9、As shown in the figure, the concentrated loads Fp act on two columns. The vertical displacement of point C is （ ）.
A、upward.
B、0
C、downward
D、related to the position of Fp
10、Compare the deflection yC and the bending moment MC of the two same structures shown in figures (a) and (b) under different loads, then the two figures ( ).
A、have same yC and MC.
B、have same yC but different MC.
C、have different yC but same MC.
D、have different yC and different MC.
11、For the system in the graph, after removing any one of the support links, the rest of the system is geometrically stable without redundant constraints.
12、If the bending moment diagram of a multi-span beam is given as Figure (a) shown, the shear force diagram is shown in Figure (b).
13、The shape of the bending moment diagram of the structure is correct.
14、In the figure, there are two states of the same structure. One is the force state and the other is deformation state. Then, θC1=ΔD2 .
15、The vertical displacement of point C is Δ. If the stiffness EI of each member is reduced to EI/2, the vertical displacement of point C is_____ Δ.
16、The EA of each member of the truss is same. The vertical displacement of point A is _______ .(positive when the displacement is downward)
17、The horizontal displacement of point B of the structure is _____ .(fill in fractions)
18、The horizontal displacement ΔCx of point C caused by the support movement of point D is____cm.(positive when the displacement is to right)
Week 12
Unit testing of chapter 9
1、
A、A
B、B
C、C
D、D
2、
A、A
B、B
C、C
D、D
3、
A、A
B、B
C、C
D、D
4、
5、
6、
7、
8、
9、
10、
Week 14
Unit testing of chapter 10
1、
A、A
B、B
C、C
D、D
2、
A、A
B、B
C、C
D、D
3、
A、A
B、B
C、C
D、D
4、
A、A
B、B
C、C
D、D
5、
A、A
B、B
C、C
D、D
6、
A、A
B、B
C、C
D、D
7、
A、A
B、B
C、C
D、D
8、
9、
10、
11、
12、
13、
14、
15、
16、
Final Exam
Final Exam
1、
A、A
B、B
C、C
D、D
2、
A、A
B、B
C、C
D、D
3、
A、A
B、B
C、C
D、D
4、
A、A
B、B
C、C
D、D
5、
6、
7、
8、
Fianl Exam
1、
2、
3、
4、
5、
6、
7、
8、
Midterm Exam
Midterm Exam
1、The geometric construction of the system as the figure shown is （ ）.
A、A stable system with no redundant restraints;
B、A stable system with redundant restraints;
C、A constantly changeable system;
D、An instantaneously unstable system.
2、The geometric construction of the system as the figure shown is （ ）.
A、A stable system with no redundant restraints;
B、A stable system with redundant restraints;
C、A constantly changeable system;
D、An instantaneously unstable system.
3、In the figure, the moment provided by support A is （ ）
A、60kN?m， lower side in tension
B、60kN?m， upper side in tension
C、20kN?m， lower side in tension
D、20kN?m，upper side in tension
4、If the diagram is a bending moment diagram of member AB, the shear force diagram is （ ）.
A、
B、
C、
D、
5、The figure shows a beam subjected to an external couple. The bending moment diagram should be （ ）.
A、
B、
C、
D、
6、The rational axial line of a three-hinged arch under downward vertical uniformly distributed load is （ ）.
A、Second-degree parabola
B、Catenary
C、Hyperbola
D、Cosine curve
7、When establish a virtual work equation, the relationship between force state and displacement state is （ ）.
A、Independent of each other
B、The displacement state must be generated by the force state.
C、Mutual causation
D、The force state must be caused by the displacement state.
8、If a rigid frame has a downward displacement a and a rotation angle α of the support A , the vertical displacement of the section B is（ ）.
A、related to h, l and EI.
B、only related to h and l.
C、only related to l.
D、only related to EI.
9、As shown in the figure, the concentrated loads Fp act on two columns. The vertical displacement of point C is （ ）.
A、upward.
B、0
C、downward
D、related to the position of Fp
10、Compare the deflection yC and the bending moment MC of the two same structures shown in figures (a) and (b) under different loads, then the two figures ( ).
A、have same yC and MC.
B、have same yC but different MC.
C、have different yC but same MC.
D、have different yC and different MC.
11、For the system in the graph, after removing any one of the support links, the rest of the system is geometrically stable without redundant constraints.
12、If the bending moment diagram of a multi-span beam is given as Figure (a) shown, the shear force diagram is shown in Figure (b).
13、The shape of the bending moment diagram of the structure is correct.
14、In the figure, there are two states of the same structure. One is the force state and the other is deformation state. Then, θC1=ΔD2 .
15、The vertical displacement of point C is Δ. If the stiffness EI of each member is reduced to EI/2, the vertical displacement of point C is_____ Δ.
16、The EA of each member of the truss is same. The vertical displacement of point A is _______ .(positive when the displacement is downward)
17、The horizontal displacement of point B of the structure is _____ .(fill in fractions)
18、The horizontal displacement ΔCx of point C caused by the support movement of point D is____cm.(positive when the displacement is to right)
Final Exam
Final Exam
1、
A、A
B、B
C、C
D、D
2、
A、A
B、B
C、C
D、D
3、
A、A
B、B
C、C
D、D
4、
A、A
B、B
C、C
D、D
5、
6、
7、
8、
Fianl Exam
1、
2、
3、
4、
5、
6、
7、
8、
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C.蛋白质溶液的稳定因素是（）
D.一般动物在卵巢表面任何部位都可以排卵，但马仅限于排卵窝处。
线型缩聚反应无所谓链引发、链增长、链终止。各步反应的速率常数和活化能基本相同。
A.开局与中局之间有截然的界线，就是当王车易位之后，通常可以说开局已经基本结束。
B.下列为我国现行标准桶装饮用纯净水，检验项目的理化指标
C.南宋及以后近体诗押韵的根据是：（ ）
D.容易诱发肾盂肾炎的因素有：
组织结构中的哪项要素一般与
A.当海啸达到海岸线浅水地带时，波长增长而波高降低，不能形成含有巨大能量的“水墙”。
B.地震现象表明，（ ）使建筑物产生上下颠簸，（ ）使建筑物产生水平方向摇晃。
C.我国规定，公司不能用资本包括股本和资本公积发放股利。
D.道夫转移率高，梳理机的产量高。
近代资本主义的兴起是重要的社会动因,促进了近代自然科学的诞生。
A.特朗普是否接受了查尔斯的环保建议
B.百合地黄汤中，仲景对百合的使用方法是
C.下列属于马太效应积极影响的是（ ）
D.高音代表确定,低音代表疑问,所以尽量用高音给出演示结果()。
电除尘器是将电场力作用在气流上，这个说法（ ）。
A.桁架结构的优点是（ ）。
B.在地球上任何物体的质心、重心、形心都是重合的。 （ ）
C.“关爱农民工子女志愿服务行动”的服务对象只包括留在农村的农民工子女。
D.企业本身来看，按风险形成的原因可将企业特别风险进一步分为（ ）和财务风险。
演讲稿结构的节奏，主要是通过演讲内容的变换来实现的。
A.感染性心内膜炎的临床特点不包括
B.民族精神相和时代精神是（）的主要内容和重要组成部分。
C.下列情况不属于重大投标偏差的是（ ）
D.规定割让香港岛的是（ ）
90、碳水化合物在人体内吸收利用的形式是（ ）
A.下列除哪项外，均可作为感染乙型肝炎的重要指标
B.市场营销理论20世纪初诞生在（ ）
C.测不准原理对于宏观物体的运动无实际意义，其原因是宏观物体
D.历史、文化、资源、环境、经济和人本身都是构成和决定一个城市品牌的要素。
C语言中对变量做强制类型转换，变量的数据类型不变，变量的值发生改变。
A.公路平面线形的三要素包括 。
B.电影是一种意义和社会的观念性实践，体现在（ ）
C.认知能力主要是指一个（）问题的能力
D.商品分析是科学确立广告主题的关键。
列属于自媒体营销方法的有（）。
A.下面哪些归属于生物质原料（ ）。
B.分析学习者学习风格的目的是（ ）
C.社交嫉妒心理如何调节( )
D.轴旋转一周所形成的旋转体的体积可表示为定积分( ) .
运输方式选择需要考虑运输期限
A.马克思说集中发展到一定阶段
B.下列哪些不属于工作分析的方法（）
C.The organs of speech inculde ___.
D.按照传统的黎族习俗，女孩子长到十三、十四岁便要搬到去居住，不与父母同住。
df6d5dbc583b4beabd50747898c58935.png
A.科斯塔斯环法可用来获得（ ）
B.师德规范体现了社会对教师职业行为的约束作用。（ ）
C.（ ）座椅冬暖夏凉，较为人性化，在园林中较受游人喜爱。
D.躯干波浪包括前波浪、后波浪,但不包括侧波浪。( )
服装面料的轻重、纹理的粗细、厚薄、光滑与粗糙都会影响量感的大小。
A.. 包皮环切对男性的性能力没有影响。
B.真武汤与实脾散，均用的药味有
C.自知力缺乏是精神病特有的表现
D.下列何结构不位于腘窝内：
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