问题 多项选择题

某机电公司承接了某造纸厂的机电安装项目,包括自动化仪表(仪表的电缆槽采用螺栓连接)、变电所安装和电缆敷设等工程。电缆有电力电缆、信号电缆和控制电缆。按规定对仪表设备及材料进行开箱检验和外观检查,仪表安装完毕后按原则进行调校。

仪表电缆槽采用螺栓连接的要求时自动化仪表工程施工的原则是()。

A.先土建后安装

B.先地下后地上

C.先安装设备再配管布线

D.先两端后中间

E.先重后轻

答案

参考答案:A, B, C, D

解答题
阅读理解

Education is required and free for every child in the United States. Most children start school by the age of six. They attend eight years of elementary school and four years of high school (or secondary school ).The money for free public schools comes from taxes, and each state is responsible for its own educational system .State legislatures (立法机关) set the educational requirements but leave the management of the schools in the hands of the local communities .Most states require their children to go to school until a certain age. This age varies from 16 to 18 years according to the laws of the individual state. The Federal government contributes funds to the states for additional schools and schools services.

After graduation from high school, a student can start his higher education in two –year college, a four-year college, a university or a specialized professional school----either public or private. Most colleges admit students on the basis of their high-school records. The cost of a college education is expensive in private universities, but it is much less in those supported by states and cities. Many students receive scholarships from the schools, the government, or private foundations and organizations. More than 50 percent of the college students work to help pay their college expenses.

Only 2 percent of the population of the country cannot read and write.

56、Where does the money for public schools come from ?

A. From the Federal government.       B. From the state legislatures.

C. From taxes.                      D. From the parents of the school children.

57、What is the educational system in the United States based on ?

A.  The Federal government                   B. Individual school

C.  Individual state                           D. Local communities

58、What percentage of the population is illiterate (文盲?

A. 50                B. 2               C. 4                    D. 6

59、How are college expenses of most students paid ?

A.      They won earnings from part-time work .

B.      Scholarship from the schools, the government or private foundations.

C.      Taxes .

D.  Both A and B.