急问OG11-107，前面没人问过

107.In his research paper, Dr. Frosh, medical director of the Payne Whitney Clinic, distinguishes mood swings. which may be violent without their being grounded in mental disease, from genuine manic-depressive psychosis.

(A)  mood swings, which may be violent without their being grounded in mental disease, from genuine manic-depressive psychosis

(B)  mood swings, perhaps violent without being
    grounded in mental disease, and genuine
    manic-depressive psychosis ,

(C)  between mood swings, which may be violent
    without being grounded in mental disease, and
    genuine manic-depressive psychosis

(D)  between mood swings, perhaps violent without
    being grounded in mental disease, from
    genuine manic-depressive psychosis

(E)   genuine manic-depressive psychosis and mood
    swings, which may be violent without being
    grounded in mental disease

答案是c，OG说“The best choice is C because it uses the idiomatically correct expression
    distinguishes between x and y
   and because it provides a structure in which the relative clause beginning which may be violent clearly modifies mood swings. ”，查了字典distinguish between和distinguish ... from 的意思相同呀，到底怎么区别？OG好像不认可distinguish...from这种表达方式。

个人愚见：distinguish between X and Y ：辨别X,Y，XY地位对称

          distinguish X from Y    ：有了一层从什么中辨别的意思，更强调X吧。