1980年，杂交水稻栽培技术成为中国转让给美国的第一项农业科技专利。该技术的发明

阅读理解。

     It was a quiet village in which there was a military camp(军营).It was far from the towns and cities

and there were some high mountains around. Of course it was a good place for training the new soldiers.

But it was difficult for the young men to go outside. Mr White, an officer of forty, was strict with them

and he hardly let them leave the camp.

     Once Mr White was ill in bed. He couldn't work and a young officer, Mr Hunt began to train the new

soldiers instead of him. He knew the young men well and let nine soldiers go to the nearest town to have

a holiday. But night fell and none came back to the camp. He was worried about it and stood at the gate.

It was five to twelve when Mr Hunt decided to go to the town and see what was happening to the young

men.He started the car quickly and set off. At that moment the nine soldiers came back. It seemed they

drank wine. Of course they found the officer was angry.

     "I'm sorry, sir," said the first soldier. "I left the town on time. But something was wrong with my bus on my way here. I had to buy a horse and made it run fast. Bad luck! It died and I had to run back."

     And the other seven soldiers said they were late for the same reasons. It was the last soldier's turn. He said, "I'm sorry, sir. I got on a bus on time, but…"

     Having heard this, the officer became even angrier and stopped him at once. He called out, "If you say something was wrong with your bus, I'll punish you at once!"

     "No, no, sir," said the young man. "My bus was all right, but the horse died!"

1. The military camp was built in the village to     __.

A. stop the soldiers from going to towns

B. stop the soldiers from meeting their friends

C. train the new soldiers              

D. make the young men live quietly

2. Mr Hunt let the nine soldiers have a holiday because      __.

A. he was kind to them                

B. they felt lonely

C. they had something important to do    

D. they were the best of all

3. The young officer was worried because     __ .

A. a traffic accident had happened

B. he was afraid something happened to the nine soldiers

C. the nine soldiers would come back  

D. the nine soldiers drank too much in the town

4. The nine soldiers returned to the camp late because       __.

A. something was wrong with their buses    

B. their horses died on the return way

C. it took them much time to run back      

D. they all drank much in the town

5. Which answer do you think is true?

A. You'll believe only the last soldier.      

B. The officer believed the nine soldiers.

C. You'll believe none of the nine soldiers.  

D. The officer won't punish his soldiers.

设A为n阶可逆矩阵，则（-A）的伴随矩阵（-A）^*等于（）。

A．-A^*

B．A^*

C．(-1)ⁿA^*

D．(-1)^n-1A^*

中关村科技园区成立20周年。温 * * * * 主持召开中关村科技园区负责人座谈会。他提出要处理好经济与科技的关系，知识和科技是对国家和经济最具安全性、竞争力和可持续发展的重要因素，是克服经济困难的根本力量，也是增强产业、产品和企业竞争力的不竭动力。这说明[ ]

A、科学技术是第一生产力

B、中国科技的总体水平同世界先进水平仍有较大差距

C、当前我国的科技水平已超过了发达国家

D、加强科技工作是发展先进文化的根本任务

排烟机使用时，（）排烟效果越好。正压送风时，排烟机（送风管）的出口风速应大于烟气的流动速度；负压抽风时，排烟机（抽风管）的进口压力应小于烟气场所的压力。

A.风量和风压越大

B.风量和风压越小

C.风量大，风压小

D.风量小，风压大

指导学生掌握艺术创造的知识和技能，形成艺术气质艺术思维，特别是艺术的（），则是美育的至高境界。