可引起类白血病反应的疾病如下，除外（） A.恶性肿瘤 B.氯霉素中毒 C.严重溶血

缺铁性贫血采用铁剂治疗，观察疗效最早标志是什么（）

A.血红蛋白上升

B.MHC增多

C.MCV增大

D.网织红细胞增高

E.骨髓血细胞形态恢复

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.

The nine-year-old raced back into the house and upstairs to his mother’s room. He found it impossible to waked 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（线绳） 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.

小题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.小题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.小题3: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.小题4: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

燃气轮机压气机叶片上沉淀的减少可以有效的提高（）和设备效率。

如图所示，滑轮A、B重量分别为P₁、P₂，半径分别为R、r，且R=2r，物体C重为P，作用在轮A的常力偶矩为M。设轮A、B为均质圆盘，则物体C上升的加速度为（）。

A．

B．

C．

D．

下列关于联锁的概念中，正确的说法是（）。

A、电磁阀一般使用的是长期带电的电磁阀

B、故障检测元件的接点一般采用常闭型，工艺正常时接点闭合，越限时断开

C、不是所有的工艺参数越限都会引发联锁的动作

D、重要设备的联锁应采用“三取二检测系统”