A.X=N+0.01N(100-N)B.X=0.01N+N(100-N)C.X=N+N(100-0.01N)D.X=0.01N+N(100-0.01N)
A.情景塑造的逼真性B.费用高C.刺激多变性D.收看被动性
A.读者针对性强B.视觉表现力强C.知识性D.时效性短