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【单选题】
可以衡量药物安全性的指标不包括:A.
治疗指数
B.
安全范围
C.
可靠安全系数
D.
ED50
E.
LD50
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反馈参考答案：
举一反三
中医学身体观的特点：
A.
时空的身体、循环的身体、功能的身体、联系的身体
B.
时空的身体、循环的身体、结构的身体、联系的身体
C.
时间的身体、循环的身体、功能的身体、联系的身体
D.
时间的身体、循环的身体、结构的身体、联系的身体
传统本草理论现代嬗变的两个特征
A.
参考西医药学和以功效分类药物
B.
注释经典和以药性分类药物
C.
恢复博物志传统 和以功效分类药物
D.
完全仿照药理学研究方法和以药性分类药物
Computer-aided engineering combines()
A.
software engineering
B.
specific knowledge
C.
design process
D.
core technology
Which is typical mechanical mechanisms as follows？
A.
The four bar linkage
B.
tappet
C.
Slider-crank mechanism
D.
Cam Mechanism
In the computational approach, the kinematic constraint equations that __ are formulated, leading to a relatively large system of nonlinear algebraic equations that can be solved using computer and nu...
The four bar linkage is used in many different devices. A few examples are？
A.
bicycles
B.
oil well pumps
C.
loaders
D.
compressors
The methods presented in the multibody dynamics research field will help engineers construct systematically the kinematic and dynamic equations of large-scale mechanical and aerospace systems that con...
A.
正确
B.
错误
In inverse dynamic analysis, we want to know joint positions, velocities and accelerations.
A.
正确
B.
错误
What is the three principal steps of kinematic analysis？
A.
velocity analysis
B.
determine all the required displacement variables
C.
differentiate the kinematic relationships
D.
acceleration analysis
Which forces belong to external forces().
A.
spring force
B.
damper force
C.
actuator force
D.
gravity force
Which of the following are subsystems of Adams Car？
A.
Adams Car Vehicle Dynamics
B.
Flexible Multibody Systems in Adams
C.
Adams Car Truck
D.
Adams machinery
Based on the principles of Lagrangian Dynamics, Adams numerically constructs and solves the system equations as functions of time .
A.
正确
B.
错误
If the problem at hand is nonlinear, both the FEA and MBD methods can produce valid, frequency domain solutions.
A.
正确
B.
错误
What equation does the RecurDyn set up?
A.
Nonlinear equation
B.
Matrix equation
C.
Ordinary Differential Equations (ODEs)
D.
Differential Algebraic Equations (DAEs)
The traditional design process often does not consider what is at the system level
A.
dynamic behaviors
B.
Static behaviors
C.
Dynamic and static behavior
D.
All
The advantages of the mechanical subsystem are
A.
can be used before CAD and kinematic analysis tools to give users an accurate assessment of system level dynamic responses
B.
can be used after CAD and kinematic analysis tools to give users an accurate assessment of system level dynamic responses
C.
can be used after CAD and kinematic analysis tools to give users an vague assessment of system level dynamic responses
D.
can be used before CAD and kinematic analysis tools to give users an vague assessment of system level dynamic responses
What is the feature of Recurdyn?
A.
recursive formulation to build the equations of motion.
B.
Set subsystem
C.
Quick replacement subsystem
D.
Modeling on both hard and soft soils
Results obtained through numerical method is based on approximation and assumption, the results need to be validated by experiments or analytical method.
A.
正确
B.
错误
In practical engineering problem solution,what are the basically three major categories of method?
A.
analytical method
B.
numerical method
C.
reasoning method
D.
experimental method
Traditional design procedures often do not account for system-level dynamic behaviors.
A.
正确
B.
错误
For the FEA of a system, the total DOFs for a given mesh model is equal to the number of nodes multiplied by the number of DOFs per node.
A.
正确
B.
错误
A linear static analysis is an analysis where a linear relation holds between applied forces and displacements.
A.
正确
B.
错误
The core of PDE method is to reduces the degrees of Freedom from infinite to finite with the help of discretization or meshing
A.
正确
B.
错误
相关题目：
【单选题】某种物质配制成5mmol/L的水溶液，用0.5cm光径的比色杯测得吸光度为0.100，据公式，计算其摩尔吸光系数为（ ）L/mol·cm。
A.
100
B.
40
C.
20
D.
200
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