softwaredesignisa__(71)__process.Itrequiresacertain__(72)__off1aironthepartofthedesigner.Designcannotbelearnedfromabook.Itmustbepracticedandlearntbyexperienceandstudyofexistingsystems.Awell__(73)__softwaresystemisstraightforwardtoimplementandmaintain,easily__(74)__andreliable.Badly__(73)__softwaresystems,althoughtheymayworkare__(75)__tobeexpensivetomaintain,difficulttotestandunreliable.
71.
A、create
B、createD、C、creating
D、creative
72.
A、amount
B、amounted`
C、mount
D、mounteD、73.
A、design
B、designeD、C、designing
D、designs
74.
A、understanD、
B、understands
C、understanding
D、understooD、75.
A、like
B、likely
C、unlike
D、unlikely