Studies of the human "sleep-wake cycle" have practical relevance for matters ran

游客2024-01-13  13

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

选项 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

解析 根据from…to结构,排除D、E;B中those指代duty assignments,用连接代词who指代duty assignments是不妥的;同时duty assignments与staff的搭配也不合逻辑。再看A:from之后是duty assignments(职责分配),而to之后是the staff(人员),两者在形式上是一致的,均为名词,但在意义上不能形成平行搭配。这一点还可由前面未划部分的matters证实。from…to结构是对matters的范围做描绘。很显然,the staff和matters不属于同一类。而C不仅在形式上而且在句意上都与duty assignments形成了完美的平行结构,the staffing是动名词,意为“人员的安排”。
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