如果A、B两点的高差hAB为正,则说明()。 A.A点比B点高 B.B点比A点高 C

题型:单项选择题

问题:

如果A、B两点的高差hAB为正,则说明()。

A.A点比B点高

B.B点比A点高

C.hAB的符号不取决于A、B两点的高程,而取决首次假定

D.不能说明什么

考点:水利工程测量水利工程测量题库
题型:单项选择题

阅读理解。

     On a Friday night in New York, a poor young man called Jay stood near the subway station, playing

his violin. The music was so great that many people slowed down and put some money into his hat.

     The next day, Jay came again. He took out a large piece of paper and laid it on the ground. Then he began

playing. It seemed more pleasant to listen to. Before long, many people came, looking at the paper. It said,

"Last night, a gentleman named George Sang put an important thing into my hat. Please come to claim. (认领)

it soon."

     Seeing this, people wondered what it could be. After about half an hour, a middle-aged man rushed

through the crowd to the young man and said, "I'm the George. I knew you'd surely come here!"

     Then George explained the whole story. He bought a lottery ticket a few days ago. Yesterday he found

that he won a prize of $ 500,000. He was very excited. On his way home, he felt the music was so wonderful

that he took out $100 and put it in the hat. However, the lottery ticket with his name on was also thrown in.

     Jay was a student at an arts school in Paris. He had booked the flight and would fly that morning.

However, when he happened to find the ticket holder had won the lottery, he cancelled (取消) the flight and

came back to the subway station.

    Later someone asked Jay, "Why didn't you take the lottery ticket for yourself?"  He said, "Although I don't

have much money, I live happily; but if I lose honesty, I won't be happy forever."

1. On a Friday night in ______, Jay played his violin near the subway station.

A. New York

B. Paris

C. Hong Kong

D. London

2. The next day, Jay put ______ on the ground.

A. his violin

B. a piece of paper

C. 100 dollars

D. a lottery ticket

3. Jay went back because he wanted to ______.

A. return the lottery ticket

B. make more money

C. go to the arts school

D. perform for people

4. The best title of the text could be "______".

A. A Poor Young Musician

B. The Price of Love and Honesty

C. A Story of the Subway Station

D. The Importance of Being Honest

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平面内不过同一点的n条直线两两相交,它们的交点个数记作an,并且规定a1=0.那么:①a2=_____;②a3a2=_______;③anan-1=______(n≥2,用含n的代数式表示).

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世界五大力量对外政策和战略关系的调整,使未来国战略格局呈现什么特征?

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《工程建设项目施工招标投标办法》规定,投标人参加工程建设项目施工投标应当具备的条件是( )。

A.具有良好的商业信誉和健全的财务会计制度

B.具有独立订立合同的权利

C.在最近三年内没有骗取中标和严重违约及重大工程质量问题

D.有依法缴纳税收和社会保障资金的良好记录

E.具有履行合同的能力

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业主不能很好地管理企业,发现问题不能及时解决属于()

A.灾害

B.高支出

C.库存不当

D.管理不完善

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