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题库 / OG2018V-SC-220
In early Mesopotamian civilization, castor oil served not only as a laxative, but also a skin-softening lotion and it was a construction lubricant for sliding giant stone blocks over wooden rollers.
not only as a laxative, but also a skin-softening lotion and it was a construction
as not only a laxative, but also a skin-softening lotion, and it was a construction
not only as a laxative but also as a skin-softening lotion and as a construction
as not only a laxative but as a skin-softening lotion and in construction, as a
not only as a laxative, but a skin-softening lotion and in construction, a
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错选B是因为忽略了主系表， the oil is a 润滑剂肯定不是is的关系，这就是考措辞吧
别自作聪明把前面分为人体后面是建筑，唉。。。。。
是比作不是真的是！！！！！！
各位，请教一下，这题如果不知道castor oil、laxative、skin-softening lotion和lubricant的中文意思，有歪门邪道能从B C之中选择正确答案吗？
Major issue-
Faulty logical parallelism.
Minor issue-
castor oil was a construction lubricant
is not same as
castor oil served as a construction lubricant
BC 对比，B中说这种油【是】一种建筑用润滑剂，那还能用来做泻药和护肤品？？好可怕的功效。C中说这种油有三种不同的用途，可以做泻药，做护肤品，也可以做建筑用润滑剂。功能多而已。C的表达更合理。
was a construction lubricant，把 castor oil 与 lubricant等价了，
served as a construction lubricant，castor oil 被用作
前面都是被用作laxative，skin-softening lotion，没理由到了lubricant就变成等价
好比一个人 works as a waiter, a cook, and a cashier，就不好说他 works as a waiter and a cook, and he is a cashier，因为三个属性是并列同时存在的，应该平行
C油是建筑润滑剂。。好像意思就是C油的用途只有用在建筑上
C油可用作建筑润滑剂 说明只是其中一种用途，前面还提到了两种用途，平行语义更加完美
注意体会三者的平行关系。
①lubricant n.润滑油
②serve as 作...用...This room can serve as/for a study. （不用在被动语态中）
③not only...but also...and可以用来表示三者平行！
lubricant 润滑油
又忘了 看意思了.....BC
not only as...but also as...and as...平行结构
说“蓖麻子油是建筑润滑油”好像也没毛病啊
castor oil was a construction lubricant
is not same as
castor oil served as a construction lubricant
it was 与it served as 的区别吗？
a, not only, but also不平行，it was construction句意逻辑不对，castor oil不可能是建筑，只能服务于建筑，这也考到了be动词前后要求实义平行
b， be动词前后不平行
d, e 的in construction找不到平行
注意B/C之间意思的差异，castor oil不是construction lubricant ，而是充当 construction lubricant .
注意but also 后面也可以接A and B结构！
BC之间可能有细微意思差别：castor oil served as a construction lubricant. 而不是 castor oil was a construction lubricant.
（蓖麻子油充当建筑润滑油 √ ）