用双线桥法标明反应2KMnO4+5Na2SO3+ 3 H2SO4=K2SO4+2MnSO4+5Na2SO4+3H2O的电子转移的方向和数目__________________。
—I'm afraid I've broken the window. Can you help me mend it?
—______.[ ]
A. That's right
B. Never mind
C. With pleasure
D. It's pleasure
()吸附缺乏选择性,并且吸附是可逆的。
A.离子吸附
B.特征吸附
C.双电层外层吸附
D.双电层内层吸附