What do you do on weekends? Some people like to stay at home, but others like to leave home and do other things. My friend, Tom works hard in a factory. He has a son and a daughter.

    On weekends, he usually does the same things. On Saturdays he washes his car and clothes. On Sundays, he goes to a farm with his family by car. His parents live there. The farm isn't very big, but there're often many things to do on the farm. The children help feed (饲养) the animals. There are many animals on the farm. You can see sheep, cows, horses and pigs. Tom and his wife help in the fields. At the end of the day, children are very tired and hungry. Tom's mother gives them a big meal. They are very happy.

植物细胞中存在“ADP+Pi+能量 ATP”的反应，其中①和②表示反应条件和过程。下列有关叙述正确的是（  ）

①“东方红1号”发射成功 ②我国第一颗原子弹爆炸成功

③科教兴国战略的提出 ④袁隆平首次育成籼型杂交水稻