试题与答案

下列关于烟草物联网中GPS导航系统论述正确的是()。A.基本原理是测量出已知位置的卫

题型:多项选择题

题目:

下列关于烟草物联网中GPS导航系统论述正确的是()。

A.基本原理是测量出已知位置的卫星到用户接收机之间的距离,然后综合多颗卫星的数据就可知道接收机的具体位置

B.用户到卫星的距离则通过记录卫星信号传播到用户所经历的时间,再将其乘以光速得到用户与卫星之间的真实距离

C.当GPS卫星正常工作时,会不断地用1和0二进制码元组成的伪随机码(简称伪码)发射导航电文

D.GPS 就是全球定位系统

答案:

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题型:阅读理解

阅读理解。

     A man from a big city with a new cart (马车) and a beautiful pair of horses was driving along a

country road . He did not give much attention to where he was going. Very soon he knew he lost his

way, but he kept on driving hoping he would meet someone or find his way back.

     It was a long way. For many hours he kept on driving. When it was almost dark he saw a farmer

who was working in a field. He stopped and shouted, "Hello, farmer!" "Hello, yourself!" the farmer

answered, still working.

     "Where does this road go?"

     "I have never seen it go anywhere. It always stays where it is." said the farmer, without stopping his

work.

     "How far is it to the next town?" said the stranger, with a little louder voice.

     "I don't know. I've never measured (测量) it ." Answered the farmer.

     By the time the city man was getting angry. "What do you know? You're the biggest fool I've seen."

The farmer stopped and turned and looked for a while at the man. Then he said, "Maybe I do not know

much, perhaps I'm a fool. But at least I'm not lost."

1. The city man said "Hello, farmer" because _______.

A. he was friendly to everyone    

B. he saw an old man in the country

C. he lost his way and he wished the farmer who would show him the way  

D. he was very happy

2. Did the farmer say anything to the city man?

A. Yes, he did.      

B. We don't know.    

C. No, he didn't.    

D. The city man didn't find his way.

3. The farmer didn't tell the city man the way to the next town because _______.

A. the farmer didn't know the way, either      

B. the farmer is busy working in the field

C. The city man asked the question rudely    

D. the farmer can't speak clearly

4. Was the farmer the biggest fool?

A. Yes, he was.      

B. No, he wasn't.      

C. Yes, he is.        

D. We don't know.

5. "I'm not lost" means "_______".

A. I'm not a fool.    

B. I haven't lost my way.  

C. I haven't lost anything.  

D. I haven't lost myself.

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