现量得了AB间的距离,DAB=123.34m,DBA=123.29m,求AB段的精度

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问题:

现量得了AB间的距离,DAB=123.34m,DBA=123.29m,求AB段的精度。

考点:工程测量工考试中级建设工程测量工中级建设工程测量工题库
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提单作为有价证券,其性质体现在哪几个方面?

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如图12-3所示,磁带录音机既可用作录音,也可用作放音,其主要部件为可匀速行进的磁带a和绕有线圈的磁头b,不论是录音或放音过程,磁带或磁隙软铁会存在磁化现象.下面对于它们在录音、放音过程中主要工作原理的描述,正确的是(   )

A.放音的主要原理是电磁感应,录音的主要原理是电流的磁效应

B.录音的主要原理是电磁感应,放音的主要原理是电流的磁效应

C.放音和录音的主要原理都是磁场对电流的作用

D.录音和放音的主要原理都是电磁感应

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Shanghai is different from New York in many ways, but there are many things that are similar.

Shanghai is one of the most populated(人口众多的) cities in Asia, and New York is one of the most populated cities in North America. The weather in summer is very hot in Shanghai, and it is the same in New York. Shanghai is a port and industrial city, and New York is too. Shanghai has a problem with pollution, and New York has a similar problem. They both have serious traffic problems.

The traffic problem in Shanghai is caused by many bicycles. The traffic problem in New York is caused by many cars. Most of the people in Shanghai live in apartments in low buildings, while most of the people in New York live in apartments in high buildings. People eat with chopsticks in Shanghai, but they eat with knives and forks in New York. While there are some differences, the main problems of big cities are almost the same everywhere in the world.

66. New York is in _______ .  

A. South Asia     B. North Asia     C. North America     D. South America

67. Shanghai has problems in _______.  

A. pollution             B. population  

C. traffic                D. A, B and C

68. People in New York live in _________.  

A. small houses in low buildings      B. apartment in high buildings

C. apartment in low buildings       D. small houses in high buildings

69. Which of the statements is right?  

A. The weather in Shanghai is hot, white the weather in New York isn't.

B. The traffic problem in Shanghai is caused by cars.

C. People in New York eat with knives and forks.

D. Shanghai is an agricultural city.

70. The main problems of big cities are _______.      

A. different       B. similar     C. complete same     D. polluted.

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材料一:国家对贫民颁给口分田,六年一次,死后归还。受田者负担租庸调。租为田租,交纳稻米;庸为徭役,每人每年十天,也可以娟布代替;调为贡物,交纳各种土特产。

请回答:

①说出材料是日本哪次改革的内容?

________________________________________________

②这次改革时的天皇是谁?有何特点?

________________________________________________

③这次改革对日本社会发展起了什么积极作用?

________________________________________________

④这一改革对我们今天的社会主义建设有怎样的启示?

________________________________________________

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我国口岸限定区域内的边境线的警戒管理,边防检查站与解放军边防部队或公安边防部队应明确分工,一般情况下,季节性开放口岸,口岸开放期间由()负责。

A、边防检查站

B、公安边防部队

C、解放军边防部队

D、武警总队

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