有个题目有点搞不清楚 嗯 麻烦帮忙解答一下把

翁羽凌虚

Recently implemented “shift-work equations” based on studies of the human sleep cycle have reduced sickness, sleeping on the job, fatigue among shift workers, and have raised production efficiency in various industries.

(A)fatigue among shift workers, and have raised

(B)fatigue among shift workers, and raised

(C)and fatigue among shift workers while raising

(D)lowered fatigue among shift workers, and raised

(E)and fatigue among shift workers was lowered while raising

key: C
不选A是不是因为如果两个动作 raise 和reduce并列，则raise之前的have必须省略？
不选B是不是因为如果在have reduced之下sickness, sleeping on the job还有fatigue之间并列必须要在fatigue之前加and?
D是不是因为lower用的不合适；并且要在sleeping之前加and?
麻烦把每个选项都解释一下吧~大恩不言谢~~~

听sophie

这个句子的结构是：
“shift-work equations” have reduced （这三个）1、sickness 2、sleeping on the job 3、fatigue among shift workers,同时raising production efficiency。
这三个reduced sickness, sleeping on the job和fatigue among shift workers是并列的。sleeping前不能加and，而应该在最后一个并列成分前也就是fatigue前加.所以排除了ABD。

E中lower和reduced是重复的，也不能选，所以是C。
这个是我的理解，本人不是NN，仅供参考~

翁羽凌虚

嘿嘿 谢谢你啦 解决我的疑惑啦 我主要就是想确认一下那三个之前的并列关系 谢谢~~~~~~~~~~~~~