根据短文内容判断正误。
Once upon a time， there lived a teacher In a small town. He often taught his students in special ways. Once he Rent four of his students to go to a small farm to see apple trees in different seasons. The first student went in winter， the second in spring. The third in summer. And the last in autumn.
After the four students came back .the teacher called them together. They pictured (描述) their feeling to the teacher. The first student said that there were no leaves on the trees. It made him very disappointed. The second student said his eyes were full of light green. It made him feel hopeful. The third one disagreed. ”What are you talking about? How pretty the trees were! The sweet smell of the beautiful flowers spread (传播） here and there.” The last one shook his head. He only saw a lot of apples on the beautiful trees.
The teacher smiled and told his students none of them were wrong. They each just saw one season. He continued， “The trees are not the same in different seasons. You can't judge (判断)a tree by only one season. Don' t let the regret of one season destroy the beauty of the rest. '
Everything has different sides in our life. Don't hurry to make a conclusion(结论)before seeing the whole of it.
为自然对数的底数，a为正常数），若经过5分钟时容器A和容器B中的水量相等，经过n分钟容器A中的水只有
，则n的值为 （ ）