曲线上为什么要设超高?

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问题:

曲线上为什么要设超高?

考点:铁路线路工铁路线路工综合练习铁路线路工综合练习题库
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夫妻个人财产是指依法或依当事人约定,夫妻婚后各自保留的一定范围内的个人所有财产。一般包括法定个人财产与约定个人财产,具体而言,包括婚前财产与婚后财产。 下列财产中哪一项属于夫妻个人财产( )

A.婚后一方接受亲友馈赠的财物

B.一方在婚前接受继承而于婚后实际取得的财产

C.夫妻分居两地分别管理、使用的婚后所得财产

D.婚后一方所得的奖金

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资产负债表中的“货币资金”项目,应根据()科目期末余额的合计数填列。

A.备用金

B.其他货币资金

C.银行存款

D.库存现金

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接入成本包括()。

A.单向使用成本

B.化学连接成本

C.物理连接成本

D.互联使用成本

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阅读理解。

     We can achieve knowledge either actively or passively (被动地). We achieve it actively by direct

experience, by testing and proving an idea, or by reasoning.

     We achieve knowledge passively by being told by someone else. Most of the learning that takes place

in the classroom and the kind that happens when we watch TV or read newspapers or magazines is

passive. Conditioned as we are to passive learning, it's not surprising that we depend on it in our everyday

communication with friends and co-workers.

     Unfortunately, passive learning has a serious problem. It makes us tend to accept what we are told

even when it is little more than hearsay and rumor (谣言).

     Did you ever play the game Rumor? It begins when one person writes down a message but doesn't

show it to anyone. Then the person whispers it, word for word, to another person. That person, in turn,

whispers it to still another, and so on, through all the people playing the game. The last person writes down

the message word for word as he or she hears it. Then the two written statements are compared. Typically,

the original message has changed.

     That's what happens in daily life. The simple fact that people repeat a story in their own words changes

the story. Then, too, most people listen imperfectly. And many enjoy adding their own creative touch to a

story, trying to improve on it, stamping (打上标记) it with their own personal style. Yet those who hear it

think they know.

     This process is also found among scholars and authors: A statement of opinion by one writer may be

re-stated as fact by another, who may in turn be quoted by yet another; and this process may continue,

unless it occurs to someone to question the facts on which the original writer based his opinion or to

challenge the interpretation he placed upon those facts.

1. According to the passage, passive learning may occur in ______.

A. doing a medical experiment

B. solving a math problem

C. visiting an exhibition

D. doing scientific reasoning

2. The underlined word "it" in Paragraph 2 refers to _____.

A. active learning

B. knowledge

C. communication

D. passive learning

3. The author mentions the game Rumor to show that _____.

A. a message may be changed when being passed on

B. a message should be delivered in different ways

C. people may have problems with their sense of hearing

D. people tend not to believe in what they know as rumor

4. What can we infer from the passage?

A. Active learning is less important.

B. Passive learning may not be reliable.

C. Active learning occurs more frequently.

D. Passive learning is not found among scholars.

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沿程阻力系数λ只与管壁粗糙度Δ和雷诺数Re有关。

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