The classes Aof steroids differ Bby one another Conly in the additional atoms at

游客2024-01-02  21

问题 The classes Aof steroids differ Bby one another Conly in the additional atoms attached Dto their central structure.

选项 A、 
B、 
C、 
D、 

答案 B

解析 By is the incorrect preposition after differ in this sentence. Correction: from.
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