问题 单项选择题

A机电安装公司承包某市一新建32层写字楼的消防系统安装工程。工程项目包括灭火系统、火灾自动报警系统以及送风、排烟系统的安装。设计技术文件规定,自动喷水灭火系统的管子公称直径为90mm,室内消火栓给水管道管径为110mm,火灾自动报警系统的工作接地线采用电缆金属管。设备系统安装完毕进行单机通电检查,正常后进行系统调试,并填写调试报告。

火灾自动报警系统中感烟探测器的安装间距不应超过( )m。

A.0.5

B.5

C.10

D.15

答案

参考答案:D

名词解释
阅读理解

Started in 1636,Harvard University is the oldest of all the many colleges and universities in the United States.Yale,Princeton,Columbia and Dartmouth were opened soon after Harvard.

In the early years,thers schools were much alike.Only young men went to college.All the students studied the same subjects,and everyone learned Latin,Greek and Hebrew.Little was known about science then,and one kind of school could teach everything that was known about the world.When the students graduated,most of them became ministers or teachers.

In 1782,Harvard started a medical school for young men who wanted to become doctors.Later,lawyers could receive their training in Harvard’s law school.In 1825,besides Latin and Greek ,Harvard began teaching modern languages,such as French and German.Soon it began teaching American history.

As knowledge increased.Harvard and other colleges began to teach many new subjects.Students were allowed to choose the subjects that interested them.

Today,there are many different kinds of colleges and universities.Most of them are made up of smaller schools that deal with special fields of learning.There’s so much to learn that one kind of school can’t offer it all.

56.The oldest university in the US is__________.

A.Yale           B.Harvard            C.Princeton          D. Columbia

57.From the second paragraph,we can see that in the early years, __________

A.those colleges and universities were the same

B.people,young or old,might study in the colleges

C.students studied only some languages and science

D.when the students finished their school,they became lawyers or teachers

58.Mondern languages the Harvard taught in 1825 were__________

A.Latin and Greek               B.Latin,Greek,French and German

C.American history and German    D.French and German

59.As knowledge increased,colleges began to teach__________

A.everything that was known      B.law and something about medicine

C.the subjects that was known     D.many new subjects

60.On the whole,the passage is about__________

A.how to start a university         B.the world-famous colleges in America

C.how colleges have changed       D.what kind of lesson each college teaches