【单选题】系统经不可逆绝热过程后,其熵变∆S12:
【单选题】__________ in debt and faced with low wages , a lot of graduates in UK don’t have the ability to live independently .
【简答题】A.It is not totally reliable. B.It doesn't guarantee a students ability in a certain subject. C.It often gives a fair picture of the year's work. D.It should be considered together with exceptions.
【单选题】系统经不可逆绝热过程后,其熵变△s ( )。