應考試權 不確定法律概念 判斷餘地 一般有效評價原則 考試評分特殊評價 作答餘地 權利保護之有效性 釋字第319號解釋 The right to take public examinations The indefinite concepts of law The theory of authorized discretion General effective appraisal principle Special appraisal that the examination scores The authorized discretion of answering Validity of the right protecting Judicial yuan interpretation no.319