There was a pet store and the owner had a parrot. One day a 1 walked in and the parrot said to the man ,“Hey you!” The man said, “What!?” The parrot said, “Your 2 is really ugly.” The man got very 3 and went to the store owner and said, “Your bird just  4 my wife. It said she was ugly.”

    The owner stormed over, 5 the bird, took it into the “black room,” shook it a bit, 6 out a few feathers, and said, “Don't ever, ever say anything to  7 my customers again. You got that！！！”

    With that 8 he took the bird and put it back into its cage. The old bird shook out its    9  and relaxed in its cage. A couple of weeks 10 and in walked this guy and his wife again. The parrot said, “Hey you!” The guy said, “What!?” The parrot answered, “You know that.”

某研究性学习小组就Na₂O₂的有关性质探究如下：向滴有酚酞的水中投入一定量的Na₂O₂，观察到先有大量气泡产生，溶液变红，过一会儿溶液又变为无色，对上述实验中溶液变红，过一会儿又退色的原因，甲、乙两同学提出了不同的解释：

甲同学认为是Na₂O₂与水反应放出氧气，氧气有氧化性，将酚酞氧化而使溶液退色；

乙同学则认为是Na₂O₂与水反应时产生了H₂O₂，H₂O₂的强氧化性使酚酞退色．

如图所示电路，电源电压不变，R是定值电阻．将一个“6V   2W”的小灯泡接在a、b两点间，小灯泡恰能正常发光；若换一个“6V  3W”的小灯泡接在a、b两点间，则这个小灯泡（　　）