在锌-铜稀硫酸组成的原电池装置中，当导线中有1 mol电子通过时，理论上两极的变化是[ ]

①锌片溶解了32.5 g ②锌片增重32.5 g ③铜片上析出1g H₂ ④铜片上析出1mol H₂

A．①和③

B．①和④

C．②和③

D．②和④

As a conductor, Leonard Bernstein is famous for his intensely vigorous and exuberant style.

A．extreme

B．enthusiastic

C．prosperous

D．nervous