以PS48300-2/50(华为公司)的开关电源为例，由于操作人员的粗心或自然因素造
题型：问答题 简答题
问题：
以PS48300-2/50(华为公司)的开关电源为例，由于操作人员的粗心或自然因素造成的直流配电短路故障将直接影响通信的安全。故障发生后如何处理？
题型：问答题 简答题
阅读理解
A 10-year-old boy decided to study Judo(柔道), although he had lost his left arm in a car accident.
He
began his lessons with an old Japanese Judo teacher. He was doing well, but he could not understand why the teacher had taught him only one move for quite a long time.
"Sir," the boy finally said, "I think I should learn more moves."
"But this is the o
nly move you will ever need to know," the teacher answered.
Not quite understanding, the boy kept training. Several months later, the teacher took the boy to his
first tournament(联赛). Surprising himself, the boy easily won his first two matches. The third match
proved to be more difficult. However, after some time, the opponent(对手) became impatient. The boy
used his one move to win the match. Now the boy was in the finals.
This time, his opponent was bigger, stronger and more experienced. Thinking that the boy might get
hurt, the referee(裁判) wanted to stop the match.
"No," the teacher said, "let him continue."
Soon his opponent made a mistake. Immediately the boy used his move to attack him. The boy won
the match and became the first one.
On the way home, the boy and the teacher reviewed every move in every match. Then the boy asked what was really on his mind. "How did I win the tournament with only one move?"
"You won for two reasons," the teacher answered. "First, you've mastered(掌握) one of the most
difficult moves in Judo. And second, the only known defense(防卫) for that move is to grasp(抓住) your
left arm. But you've lost it." The boy's biggest weakness had become his biggest advantage.
1. Why did the referee want to stop the final match?
A. Because the boy was not ready for the final match.
B. Because the boy's opponent was much stronger than him.
C. Because the boy was too tired to fight in the match.
D. Because the boy's teacher asked the referee to stop it.
2. What's the correct order of the following events?
a. The boy won the final match.
b. The boy began to learn Judo.
c. The boy lost his left arm in an accident.
d.
The boy won the first three matches.
e. The boy learned why he won the matches.
A. c-b-d-e-a 
B. c-b-d-a-e
C. b-c-d-e-a
D. b-c-d-a-e
3. The boy won the final match because of the following reasons EXCEPT ______.
A. the boy acted in a different way this time
B.
his opponent couldn't grasp the boy's left arm
C. the boy pinned his opponent at the right moment
D. the boy mastered one of the most difficult moves in Judo
4. What can we learn from the passage?
A. We shouldn't look down on disabled people.
B. We can
win a match if we know ourselves well.
C. Our disadvantages can be advantages sometimes.
D. Disabled people can't be successful, too.