阅读短文，判断正(T)误(F)。
A man saw a boy standing beside a lake with a mirror (镜子). "Excuse me," he said "but could you tell me
what you're doing?" "I'm fishing." "With a mirror? Could you tell me how it works?" the man asked. "OK, but I
want five dollars."
The man wanted to know the secret very much, so he handed the boy the money. "Now show me how it
works," he said. "Well", the boy began, "you hold (拿) the mirror towards the water, and when a fish goes by,
the sunlight in the mirror gives him a surprise. He stops and doesn't know what to do, and then you catch him at
once." The man was surprised, "Can you really catch fish with the mirror? How many did you catch?" "You're
the fifth today!" replied the boy.
( ) 1. The man wanted to look at the boy's mirror.
( ) 2. The man gave the boy five dollars.
( ) 3. The boy caught five fish that day.
( ) 4. The boy got fifteen dollars that day.
( ) 5. When the man heard the boy's words, he would be very happy.
2Z(g)的平衡常数为1 600。此温度下，在容积一定的密闭容器中加入一定量的X和Y，反应到某时刻测得各组分的浓度如下：