不符合慢性单纯性鼻炎的描述是（）。 A.持续性鼻塞 B.脓涕 C.常有头痛、咽痛及耳

使冻伤人员的冻伤部位解冻时,应该用下述( )方法？

A．不超过40℃的温水浸泡

B．火烤气

C．不低于50℃的热水浸泡

细菌菌落的特征是（　　）

A．表面或光滑粘稠，或粗糙干燥，往往菌落较小

B．表面比较粗糙干燥，往往形成很大的菌落

C．菌落光滑或粘稠，是霉菌菌落的几倍到几十倍大小

D．呈大片的斑点状，是霉菌菌落的几倍大

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

在细胞介导的抗肿瘤免疫中，下述正确的是（）

A.CD8⁺CTT是抗肿瘤免疫的主要效应细胞

B.CTL杀伤肿瘤细胞不受MHC限制

C.用巨噬细胞抑制剂可抑制机体内肿瘤生长

D.中性粒细胞可特异的杀伤人体内多种肿瘤

E.NK细胞通过表面的IgEFc段受体与瘤细胞上的抗体结合发挥ADCC效应

背景
某水库溢洪道加固工程，控制段现状底板顶高程30.0m，闸墩顶面高程42.0m，墩顶以上为现浇混凝土排架、启闭机房及公路桥。加固方案：底板顶面增浇20cm混凝土，闸墩外包15cm混凝土，拆除重建排架、启闭机房及公路桥。其中现浇钢筋混凝土排架采用爆破拆除方案。夜间施工时，却发生了高空坠落死亡4人的事故。本事故发生后，及时上报，并组成了事故调查组。
问题：

指出本工程施工事故等级，事故调查组应如何组成