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

在“至其当发，间不容瞚，手动而务，针耀而匀”中，“务”之义为（）

A.作事认真

B.专心一意

C.通"鹜"，鸭也

D.通"骛"，野马