精选优质文档-倾情为你奉上1、 (1) 0 . (2) (3) (4). .(5) 26/3 2、 (6) The right proposition in the following propositions is _A_.A. Ifexists anddoes not exist thendoes not exist.B. If,do both not exist thendoes not exist. C. Ifexists anddoes not exist thendoes not exist. D. Ifexists anddoes not exist thendoes not exist.(7) The right proposition in the following propositions is _B_.A. Ifthenexists. B. If thendoes not exist. C. Ifd