To maintain a leading position in the market, companies have to develop products which are cheaper, more ______ and more reliable than those of their competitors. A: innovative B: commensurate C: enlightening D: legitimate

Features of mental symptoms include ( ) A: mental symptoms are not controlled by the patient's consciousness B: symptoms can be eliminated by shifting attention C: the content of psychiatric symptoms is not commensurate with the surrounding objective environment. D: patients are accompanied by different degrees of social function damage