从下面提供的答案中选出应填入下列英文语句中______内的正确答案。 Software design is a (1) process.
从下面提供的答案中选出应填入下列英文语句中______内的正确答案。
Software design is a(1)process. It requires a certain(2)of flair on the part of the designer. Design cannot be learned from a book. It must be practiced and learnt by experience and study of existing systems. A well(3)software system is straight-forward to implement and maintain, easily(4)and reliable. Badly(3)software system, although they may work, are(5)to be expensive to maintain, difficult to test and unreliable.