160km/h以下区段接触网的之字值标准值为()。 A.200-250mm B.20

题型:单项选择题

问题:

160km/h以下区段接触网的之字值标准值为()。

A.200-250mm

B.200-300mm

C.200-350mm

D.200-400mm

考点:接触网工考试中级接触网工中级接触网工题库
题型:单项选择题

阅读理解。

     Today anyone will accept money in exchange for goods and services. People use money to buy food,

furniture, books, bicycles and hundreds of other things they need or want. When they work, they usually get

paid in money.

     Most of the money today is made of metal or paper. But people used to use all kinds of things as money.

One of the first kinds of money was shells.

     Shells were not the only things used as money. In China, cloth and knives were used. In the Phillipine

Islands, rice was used as money for a long time. Elephant tusks, monkey tails and salt were used as money in

parts of Africa.

     The first metal coins were made in China. They were round and had a square hole in the centre. People

strung (串联) them together and carried them from place to place.

     Different countries have used different metals and designs for their money. The first coins in England

were made of tin (锡). Sweden and Russia used copper (铜) to make their money. Later some countries began

to make coins of gold and silver.

     But even gold and silver were inconvenient if you had to buy something expensive. Again the Chinese

thought of a way to improve money. They began to use paper money. The first paper money looked more like

note from one person to another than the paper money used today.

     Money has had an interesting history from the days of shell money until today.

1. In the Philippines Islands _____ was once used as money.

A. rice

B. knife

C. cloth

D. wheat

2. What was the first used as money? 

A. Elephants tusks

B. Cloth

C. Salt

D. Shells

3. The first metal coins looked like _____.

A. square-shaped with some designs on them

B. square-shaped with a round hole in the center

C. round-shaped with a square hole in the middle

D. round-shaped with a round hole in the middle

4. The first paper money ______.

A. was passed from west Asia to China

B. looked like a note used today

C. was first used in Europe

D. looked like a piece of fur

5. We can infer from the passage that _____.

A. paper money isn't difficult to make

B. money must be suited to carry

C. people need money to exchange goods with each other

D. people prefer metal coins to paper notes

题型:单项选择题

打印机是一种常用的输出设备,除了有些高速激光打印机使用SCSI接口与PC机相连外,打印机一般都使用并行接口与PC机相连,但近年来使用 【18】 接口的情况越来越多。

题型:单项选择题

组织信息变更通知标准是()

A.专营店需更改有关增值税发票类的信息时应填报《专营店增值税发票变更表》

B.专营店需登报说明变更,并将原件寄予厂家网络部

C.网络部对专营店信息进行及时维护与更新

D.网络部通知东风悦达起亚销售本*部内各业务部门

题型:单项选择题

下一代在形态、特征、生理等各方面与上代的一致性称为()。

A.变异

B.遗传

C.突变

D.传代

题型:单项选择题

话统是发现寻呼问题的重要手段,可以从以下那些指标有针对的对网络寻呼指标进行优化:()

A.CN_PAGE_IDLE_UE_SUCC_RATE

B.UTRAN_PAGE1_SUCC_RATE

C.第一次寻呼的成功率

D.第二次寻呼的成功率

E.RRC建立成功率和RAB建立成功率

F.业务面拥塞率

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