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更多“What is phase diagram？ Name the three variables needed to specify the conditions of equilibrium for”相关的问题
第3题
Which phase of the software development requires the most development time？( )
A．the design phase B．the testing phase
C．the maintenance phase D．the development phase
第4题
Which phase of the software engineering process results in the Software Requirements Specification？( )
A．definition phase B．engineering phase
C．maintenance phase D．development phase
第5题
第7题
Which of the following statements is true？( )
A．The definition phase results in the Software Requirement Specification
B．Festing is optional in software life cycle
C．CASE tools can only aid in the design phase of a soft ware life cycle
D．A change during a later phase doesn’t require the document of all earlier phases to be updated
第8题
A．low cohesion with low coupling B．low cohesion with high coupling
C．high cohesion with low coupling D．high cohesion with high coupling
第9题
从供选择的答案中，选出最确切的解答。
The purpose ofthe requirements definition phase is to produce a clear, complete, consistent, and testable(1)of the technical requirements for the software product.
During the requirements definition phase, the requirements definition team uses an iterative process to expand a broad statement of the system requirements into a complete and detailed specification of each function that the software must perform and each(2)that it must meet. The starting point is usually a set of high-level requirements from the(3)that describe the project or problem.
In either case, the requirements definition team formulates an overall concept for the system and then defines(4)showing how the system will be operated, publishes the system and operations concept document and conducts a system concept review (SCR).
Following the SCR, the team derives(5)requirements for the system from the high level requirements and the system and operations concept. Using structured or object-oriented analysis the team specifies the software functions and algorithms needed to satisfy each detailed requirement.
第10题
Which of the following is TRUE concerning creep()
A．Typically results in bulk fracture of the restoration
B．Is comhlon in high copper alloys
C．Occurs more frequently within the eta phase
D．Correlates with marginal breakdown
第11题
Dinitrogen pentaoxide, N2O5, is the anhydride of nitric acid. It is not very stable, and in the gas phase or in solution with a nonaqueous solvent it decomposes by a first-order reaction into N2O4and O2. The rate equation is
v=kc(N2O5)
At 45℃, the rate constant for the reaction in carbon tetrachloride is 6.22×10-4s-1. Ifthe initial concentration of the N2O5in the solution is 0.100mol·dm-3, how many minuteswill it take for the concentration to drop to 0.0100 mol·dm-3？
