图书馆的（）工作按性质可分为读者工作和藏书工作。

第三节：阅读理解（共25小题; 每小题2分, 满分50分）

It was 3:12 a. m. when nine-year-old Glenn Kreamer awoke to the smell of burning. Except for the crackling（爆裂声）of flames somewhere below there was not a sound in the two-storey house at Baldwin, Long Island.

With his father away on night duty at a local factory, Glenn was worried about the safety of his mother, his sister Karen, 14 and his 12-year-old brother Todd. He ran downstairs through the smoke filled house to push and pull at Karen and Todd until they sat up. Then he helped each one through the house to the safety of the garden. There, his sister and brother, taking short and quick breaths and coughing, collapsed on the lawn (草坪).

The nine-year-old raced back into the house and upstairs to his mother’s room. He found it impossible to woke her up. Mrs. Kreamer, a victim of the smoke, was unconscious, and there was nobody to help Glenn carry her to the garden. But the boy remained calm and, as a fireman said later, “acted with all the self-control of a trained adult.”

On the bedroom telephone, luckily still working, Glenn called his father and, leaving Mr. Kreamer to telephone the fire brigade and ambulance service, got on with the task of saving his mother.

First he filled a bucket with water from the bathroom and threw water over his mother and her bed. Then, with a wet cloth around his head he went back to the garden.

He could hear the fire engine coming up, but how would the firemen find his mother in the smoke-filled house where flames had almost swallowed up the ground floor?

Grasping firmly a ball of string from the garage, Glenn raced back into the house and dashed upstairs to his mother’s room. Tying one end of the string to her hand he ran back, laying out the string as he went, through the hall and back out into the garden.

Minutes later he was telling fire chief John Coughlan: “The string will lead you to mother.” Mrs. Kreamer was carried to safety as the flames were breaking through her bedroom floor.

1．Why did Glenn run downstairs first?

A．He wanted to find out what was happening.  

B．He was worried about his mother’s safety.

C．He wanted to save his sister and brother.    

D．He went to see if his father had come back from work.

2．How did Glenn help the firemen to save his mother?

A．By throwing water all over her and her bed.    

B．By carrying her to safety with his brother.

C．By pushing and pulling at her.              

D．By tying a string to her hand.

3．Who called the fire brigade and ambulance service?

A．Glenn.    B．Glenn’s father.     C．Glenn’s sister.    D．Glenn’s neighbor.

4．What did Glenn do to protect himself?

A．He put a wet cloth around his head.      B．He threw water all over himself.

C．He hid himself in the bathroom.         D．He rushed out to the lawn.

5．Glenn saved his family because___________.

A．his father had taught him to do so on the phone   

B．he had learned something about first aid

C．he had dealt with the emergency calmly and wisely 

D．he had followed his mother’s instruction

STIR技术的特点是（）。

A.信号抑制的选择性

B.扫描时间短

C.适用于增强扫描

D.大FOV扫描也能获得良好的脂肪抑制效果

E.对场强的依赖性很高

患者，女，30岁。反复上腹痛6年，饥饿时加重，进食后减轻。近1周来进食后上腹部胀痛加重，但大量呕吐后减轻。查体：轻度脱水，上腹部膨隆，有震水音。应首先考虑的是（）。

A.多发性溃疡病

B.复合性溃疡病

C.胃溃疡恶变

D.十二指肠溃疡伴幽门梗阻

E.胃窦部溃疡伴急性穿孔

临时占用道路期限最长不得超过（）

A.一年

B.二年

C.三年

D.半年

安装在刀架上的车孔刀，当其刀尖低于工件中心时，会使切削时实际前角增大，后角减小。( )