骨良性肿瘤中，以哪种发病率最高() A.骨软骨瘤  B.骨巨细胞瘤  C.软骨瘤

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     One day. Many years ago, when I was working as a psychologist in England, David was brought into

my office. His face was pale (苍白) and he looked at his own feet.

     David lost his father when he was two years old and lived with his mother and grandfather ever since.

But the year before he turned 13, his grandfather died and his mother was killed in a car accident. His

teacher told me that he refused to talk to others from then on.

      How could I help him?

      David didn't say a word. As he was leaving. I put my hand on his shoulder.

      "Come back next week if you like," I said.

      He came and I suggested we played a game of chess. He agreed. After that we played chess every

Wednesday afternoon-in complete silence. Usually, he arrived earlier than he agreed. It seemed as if he

liked to be with me. But why didn't he ever look at me?

     "Perhaps he simply needs someone to share his pain with," I thought.

     Months later, when I was looking at his head, he suddenly looked up at me. "It's your turn," he said.

After that day, David started talking. He finally had friends in school and he even joined a bicycle club.

He wrote to me a few times. Now he had really started to live his life.

     Maybe I gave David something. But I learned a lot from him. I learned how time makes it possible to

get over what seems to be painful. David showed me how to help people like him. All they need is a

shoulder to cry on, a friendly touch and an ear that listens.

1. When David was brought into the writer's office, _____. [ ]

A. he said hello to the writer

B. he seemed happy

C. he looked at his own feet

D. he smiled at the writer

2. David's father died when he was _____ years old. [ ]

A. 13

B. 2

C. 5

D. 6

3. To help David, the writer _____ every Wednesday afternoon. [ ]

A. played chess with him

B. told stories to him

C. wrote letters to him

D. played soccer with him

4. What club did David join? [ ]

A. A chess club

B. An art club

C. An English club

D. A bicycle club

5. Which of the following statements is NOT true? [ ]

A. David finally got friends in school.

B. After his father died, David refused to talk to others.

C. David didn't say anything to the writer at first.

D. At last the writer learned a lot from David.

吸收塔釜液泵跳车后，操作人员立即上现场启动备用泵的同时，室内应（），以尽可能避免回收塔冲塔。

A、立即快速减少回收塔加热蒸汽量

B、立即增大溶剂水量和急冷后冷器凝液外送量，在控好低压蒸汽管网压力的同时，适降回收塔加热蒸汽量

C、立即撤出回收塔加热蒸汽

D、立即增大贫水/溶剂水槽至回收塔釜补加水量

患者，男性，68岁。突发腹痛伴停止排气排便1日，未呕吐。查体：腹膨隆且不对称，以左下腹为著，并可触及压痛，肠鸣音7次／分，移动性浊音（-），指诊直肠空虚，指套无血迹，既往有便秘史多年，无糖尿病、冠心病史。

如患者经钡剂灌肠发现乙状结肠远端呈鸟嘴状，则应进行的主要处理措施为（）

A.剖腹探查术

B.温盐水灌肠

C.胃肠减压

D.抗菌素及补液支持

E.解痉药物

关于法洛四联症的临床表现，正确的是（）

A.青紫为其主要表现

B.多有蹲踞症状

C.由于肺循环血流增多而易反复呼吸道感染

D.哭闹时可诱发缺氧发作

E.有杆状指（趾）

急性肾炎时，在肾小球毛细血管襻及系膜区沉着的补体主要为哪一种（）

A.C1

B.C2

C.C3

D.C4

E.C5