该病人首先考虑的诊断是A．主动脉夹层分离 B．自发性气胸 C．急性胰腺炎 D．急性肺

阅读理解。

　　Bob Smith is a little boy. On the first day at school, his teacher, Ms. Green,

teaches him three words-you, he and I. Then the teacher says, "I am your teacher.

You are my student. He is your classmate."

　　When school is over, Bob goes home. His mother asks him,"What does your

teacher teach you today?" Bob says with a smile,"Listen, Mum. I am your

teacher, you are my student and he is your classmate."His mother says,"No, dear.

You are wrong."Then she says, "I am your mother. You are my son. He is your

father."

　　The next morning at school, Bob's teacher asks Bob to make sentences with

the words "you, he and I". Bob stands up and says, "I am your mother. You are

my son. He is your father."

1. _____ teaches Bob three words.

A. Bob's teacher              

B. Bob's father  

C. Bob's mother              

D. Bob's grandfather

2. Bob answers his mother with a smile because _____.

A. he thinks he can give a good answer

B. he goes to school on the first day

C. he is at home now 

D. he is happy today

3. Bob's mother is _____.

A. happy    

B. right         

C. well        

D. wrong

4. _____ is Bob's mother.

A. Ms. Green  

B. Mr. Smith    

C. Mrs. Smith    

D. Mrs. Green

5, one is right?

A. Bob's teacher is wrong. 

B. Bob's mother is wrong. 

C. Bob is wrong. 

D. Bob knows how to use "you, he and I".

金融市场常被称为“资金的蓄水池”和“国民经济的晴雨表”，分别指的是金融市场的（）。

A.集聚功能，资源配置功能

B.财富功能，资源配置功能

C.集聚功能，反映功能

D.财富功能，反映功能

畅流期受断面冲淤、变动回水、水草生长等因素影响，或冰期结冰影响，使水位流量关系紊乱，而流量变化较小时，只要流量成果精度符合要求、测次较多，能基本上控制（），可使用连实测流量过程线发推求流量。

A.流量变化过程

B.含沙量变化过程

C.最大流量

D.最大流量

如果某局域网的拓扑结构是______，则局域网中任何一个节点出现故障都不会影响整个网络的工作。

A．总线型结构

B．树型结构

C．环型结构

D．星型结构

变更抚养权需要哪些手续？