【简答题】一封闭体系,经历一系列变化又回到了初始状态,则下列关系正确的是( )A. Q =0 , W ≠ 0 , D U = 0 , D G = 0B. Q =-W , D U = Q+W , D H = 0C. Q ≠ 0 , W = 0 , D U = 0 , D H = QD. Q ≠ -W , D U = Q+W , D H = Q
【简答题】用所给词的适当形式填空。 1. Here is a book _____ (call) Harry Potter. 2. She prefers _____ (play) volleyball to _____ (watch) the s on TV. 3. They play different _____ (kind) of music. 4. It is _____ (importa...