Software design is a (66) process. It requires a certain (67) of flair on the part of the designer. Design can net be learned from a book. It must be practiced and learnt by experience and study of existing systems. A well (68) software system is straight forward to implement and maintain, easily (69) and reliable. Badly (68) software systems, although they may work are (70) to be expensive to maintain, difficult to test and unreliable.

67（）

A．amount

B．amounted

C．mount

D．mounted

对新设立中介服务机构的房地产估价机构资质等级应当核定为( )级资质。

A．一
B．二
C．三
D．四