题目

Gu Changwei was the first Chinese cinematographer to be nominated (提名) for an Oscar, and he is regarded by Zhang Yimou as the best cinematographer in China．Gu was behind the camera for many of Zhang Yimou’s famous films including the one that rocketed Zhang to fame: Red Sorghum (高粱)．And now this master of the visual has taken on his first directing role with the film Peacock．So Gu Changwei has come out from behind the camera into the spotlight (聚光灯). Gu Changwei is very serious about his directing Peacock．To get the authentic atmosphere, Gu took his film crew to the cit 若为实数，则下列命题正确的是   A．若，则                 B．若，则   C．若，则                 D．若，则