人体感染下列传染病后免疫状态是流感 A．持续免疫 B．短暂免疫 C．带虫免疫 D．再

阅读理解。

     At midnight(半夜)Mr. King coughed again. He got up and took some medicine. Before he lay down again, he smoked. And he couldn't go to sleep any longer. He found the medicine book and began to read it. He was afraid he had lung cancer(肺癌). He seemed to see death was waiting for him. Tears (眼泪)ran down his face. He didn’t see his wife was standing by him.

   “What’s wrong with you, dear?” asked the woman.

   “Nothing,” the old man answered and covered his face with his hands.

     The old woman opened the book and understood at once. She said, “You must stop smoking right now.”

    “I began to smoke when I was nine, you know. How can I do that?”

    “but I think health is more important.”

     Mr. King coughed again and his wife said, “Go to see a doctor tomorrow. He will be able to help you, I think.”

     The doctor told Mr. King to have an X-ray examination(X光检查)of his lungs. And then he looked at the X-ray carefully for a long time.

     “Tell me the truth, doctor. ” said Mr. King, “Do you see any shadows (阴影) in my lungs?”

     “No, I don’t see anything.”

     “Yes?” the old man said happily. “Really?”

     “Yes. Your lungs are turning black. How can I see any shadows?”

根据短文内容选择正确的选项。

1. Mr. King got up to ______.

A．smoke again            

B．talk with his wife

C．read the medicine book.  

D．take some medicine

2. Mr. King coughed because ______.

A．he couldn’t go to sleep    

B．he was afraid to die

C．he smoked too much      

D．he was too old

3. ______, so tears ran down his face.

A．Mr. King thought he had lung cancer

B．Mr. King couldn’t understand the book

C．Mr. King was too sad to go to sleep

D．The doctors refused to help Mr. King

4. The doctor told Mr. King to have an X-ray examination because ______.

A．he was sure the man would soon die

B．he wanted the man to stop smoking right now

C．he wanted to know if there was something wrong with his lugs.

D．he was sure the man would soon be all right

5. Which of the following is true?

A．There was nothing serious with Mr. King.

B．Smoking too much caused Mr. King’s lungs to turn black.

C．The doctor found some shadows in Mr. King’s lungs.

D． Mr. King decided to stop smoking at once.

病人，男性，20岁。饮食不当，突然上腹痛、恶心、呕吐、发热、脱水，拟诊断为急性胃炎，在发病后何时做胃镜检查为宜（）

A.6小时

B.12小时

C.24～48小时

D.48小时后

E.72小时后

公众及中小企业宽带用户数累计不足14.3万户的地市宽带用户网内通信质量升级投诉次数≤1次不扣分高于1次按正常标准扣分。

如果有通风自动控制系统，在控制系统内可以事先编制好利用轴流风机排除仓顶积热的通风控制程序，从而可以避免人为操作带来的（）。

A.复杂性

B.误差

C.不经济

D.危险性

JT1-C系列机车信号主要采用二取二的容错安全结构，32位浮点译码技术，（）、时域相结合的分析方式，双线圈感应器接收，以及采用一体化大容量机车信号记录器等。