计算：23+1-27．

严禁气泡进入静脉系统（）
因左室发育不良，术后易发生急性肺水肿（）
手术中行控制性降压时应预防肾脏血流不足（）
肺循环血量减少（）
采用吸入麻醉诱导，起效快、诱导时间短（）

A.严重的主动脉缩窄

B.肺静脉畸形引流

C.动脉导管未闭

D.法洛四联症

E.成人房间隔缺损

CT的分析与诊断不正确的说法是（）。

A.应先了解扫描的技术与方法，是平扫还是增强扫描

B.须应用窗技术，分别调节窗位和窗宽，使观察组织显示得更为清楚

C.发现病变要分析病变的位置、大小、形状、数目和边缘，病变密度及强化，还要观察邻近器官的受压、移位和浸润、破坏

D.结合临床资料可对病变病理性质做出诊断

E.良好的解剖影像背景是CT的显影特点，也是诊断的主要依据

Computer programmer David Jones makes 35,000 pounds a year designing new computer games, yet he cannot find a bank prepared to let him have a credit card (信用卡). Instead, he has been told to wait another two years, until he is 18.

The 16-year-old boy works for a small firm in Liverpool, where the problem of most young people of his age is finding a job. David’s firm puts two new games on the home market each month.

But David’s biggest headache is what to do with his money. In spite of his salary, made by inventing new programs within a quite short period of time, the bonus payments and profit-sharing (奖金和分红), he cannot drive a car, get some money from a bank to buy a house, or get credit cards.

He lives with his parents in their house in Liverpool, where his father is a bus driver. His firm has to pay ￡150 a month in taxi fares to get him the five miles to work and back every day because David cannot drive.

David got his job with the firm a year after leaving school with six 0-levels and working for a time in a computer shop. “I got the job because the people who run the firm knew I had already written some programs,” he said.

“I suppose 35,000 pounds sounds a lot but actually that’s not good enough. I hope it will come to more than that this year.” He spends some of his money on records and clothes, and gives his mother 20 pounds a week. But most of his spare time is spent working.

“Unfortunately, computing was not part of our studies at school,” he said. “But I had been studying it in books and magazines for four years in my spare time. I know what I wanted to do and never considered staying on at school. Most people in this business are fairly young, anyway.”

David added, “I would like to earn a million and I suppose early retirement (退休) is a possibility. You never know when the market might disappear.”

36. Why is David different from other young people of his age?

A. He earns a very high salary.

B. He has not a job.

C. He does not go out much.

D. He lives at home with his parents.

37. David’s greatest problem is ____________.

A. making the banks treat him as a grown-up

B. inventing computer games

C. spending his salary

D. learning to drive

38. He was hired by the firm because ____________.

A. he had worked in a computer shop

B. he had written some computer programs

C. he worked very hard

D. he had learned to use computers at school

39. He left school after taking six 0-levels because ____________.

A. he did not enjoy school

B. he wanted to work with computers and staying at school did not help him

C. he was afraid of getting too old to start computing

D. he wanted to earn a lot of money

40. Why does David think he might retire early?

A. One has to be young to write computer programs.   

B. He wants to stop working when he is a millionaire.

C. He thinks computer games might not always sell so well.

D. He thinks his firm might go bad.

分布式能源系统是指各种集成或单独使用、靠近小型用户、容量范围在几千瓦到50兆瓦的模块化发电装置，与其能源管理和储存系统相结合，用于改善输电系统的运行。　　根据上述定义，下列不属于分布式能源系统的是（ ）

A．在医院附近设立模块化发电设备，保证医院供电稳定

B．在工业园区附近设置发电装置，以防电网崩溃影响生产

C．在社区附近设立发电装置，以防用电高峰时电力不足而跳闸

D．在便利店里面放置千瓦以内的小型发电机，以便在停电时应急

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