阅读短文，判断下列句子是否正确。
My friend Tom lives on Sun Street. It is near his school. He usually goes to school on foot. But sometimes he goes to school by bike. His father is a doctor. He goes to work by car. His mother is a teacher. She teaches English. She goes to work by metro. Today is Sunday. Tom doesn't have any lessons. He wants to go to Nanjing by train.
通过，充放电的化学方程式为 2Na2S2+NaBr3
Na2S4+3NaBr。