The day started out bad. She overslept and was late for work. Then everything __16__ happened at the office made her unhappy, too. By the time she reached the bus stop for her bus to go home, she had a bad stomachache.
As usual, the bus was late, and full of people. There was no free seat for her and she had to stand in the bus. As the bus drove, it pulled her __17__ all directions, and she felt even __18__(bad).
Then she heard a voice from up front, "Beautiful day, isn’t it?" Because of the crowd, she could not see the man, __19__ she heard him as he continued to comment on the beautiful spring scenery, __20__ (call) attention to every building and thing that people could see as the bus passed by. Soon, all of the passengers __21__ (look) out of the windows. The man’s words were so powerful that she found __22__ smiling for the first time that day.
The bus reached her stop, and as she moved toward the door, she got a look at their "guide": an old gentleman __23__ a beard, wearing dark glasses and carrying a thin white cane(木杖). He was blind.
Sometimes it is not that there is no __24___(beautiful) in __25___ world, it is just that there is no eye that can see that . Open your eyes and say, "Beautiful day, isn’t it?"
，
和I均为正值，则供出功率的电源是（）。