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

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 only 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.

某男，38岁，反复头昏、乏力1年余，偶有尿色加深现象。近日感冒后症状加重，并出现呼吸困难，排酱油色尿，以清晨为重，Hb35g/L，PLT35×10⁹/L，为大细胞正色素性贫血，尿隐血强阳性。

最有价值的诊断项目是（）。

A.血常规

B.肾功能

C.骨髓穿刺

D.Ham试验

E.尿常规

拉敏木制的木扇

如果胎儿脊柱纵切面结构中断，不完整，横切面椎体失去正常三足鼎立光团，而呈"U"形图像，可能是（）

A.脊柱前移

B.脊柱侧凸

C.脊柱裂

D.脊柱前凸

E.脊膜膨出