The signed version of the core test case is authentic. The signature version of the core exam case is 65,438+0,000 sets of core exams, signed by Xu Tao, a teacher who is in contact with the postgraduate education of Yuntu. Cloud image education is a comprehensive education platform that provides college students with all kinds of online learning such as entrance examination and textual research. The official online examination course under the Higher Education Press is formal.