问一道蓝皮的题 P55-8

Studies of the human "sleep-wake cycle" have practical relevance for matters ranging from duty assignment in nuclear submarines and air-traffic control towers to the staff of shifts in 24-hour factroies.

A to the staff of

B to those who staff

C to the staffing of

D and staffing

E and the staff of

答案C      选的A……

万分感激～

Let me have a try~~~~

from
        duty assignment to
        the taffing of

from to 前后强调结构对称

A to the staff of

staff 强调员工的个体,是具体名词,不能和duty assignment抽象名词并列

C to the staffing of

the staffing是抽象名词,可以翻译为"人员的配备",这样就可以和前面的抽象名词并列了~~~