下列（）体征可判断为开放性气胸。A．紫绀  B．气管向健侧移位  C．伤口有气体出入

阅读理解。

     A big company wanted a clerk, so John went there. In the interview the director asked him a question.

     "Who paid for your school?"

     "My mother paid for it by washing clothes."

     Hearing this, the director asked John to show his hands. John showed a pair of hands that were perfect.

The director said, "When you go back today, go and clean your mother's hands, and then see me tomorrow

morning."

     When John went back, he happily asked his mother to let him clean her hands. However, his tears fell as

he cleaned his mother's hands. It was the first time he noticed that there were too many bruises (伤痕) in his

mother's hands. After finishing the cleaning of his mother's hands, John quietly washed all the remaining

clothes for his mother.

     Next morning, John went to the director's office. The director noticed the tears in John's eyes and asked,

"Please tell me your feeling."

     John said, "Number 1, I know now what appreciation is. I would not be successful if my mother didn't

do these things. Number 2,by helping my mother, now I realize how difficult it is to get something done."The

director said, "This is what I want to be my clerk. You can get the job."

1. John went to the big company to _____.

A. look for his mother

B. ask for a job

C. ask the director for help

2. John's mother was a (n) _____.

A. office clerk

B. director

C. clothes cleaner

3. From the underlined sentence, we learn _____.

A. John tried his best to wash clothes for his mother

B. John often helped his mother do the housework

C. John hardly helped his mother wash clothes

4. John felt _____ when he cleaned his mother's hands.

A. happy

B. sad 

C. angry

5. Why did the director hire (雇佣) John?

A. Because he thought John learned appreciation.

B. Because he thought John had a good education.

C. Because he thought John worked very hard.

根据《合同法》的规定，恶意串通，损害第三人利益的合同属于（）。

A.无效合同

B.可撤销合同

C.有效合同

D.效力待定合同

下列不是设立股份有限公司必须具备的条件是（）。

A.发起人符合法定人数

B.发起人认缴和社会公开募集的股本达到法定资本最低限额

C.所有股东共同制定公司章程

D.有固定的生产经营场所和必要的生产经营条件

所有组织的目标都是为了向消费者交付优质的产品和服务。

如果提高管电流，而管电压不变，则射线束的穿透力有没有变化？（）

A、有变化

B、按正比规律变化

C、没有变化

D、按反比规律变化