问题 解答题

某学校组织八年级学生参加社会实践活动,若单独租用35座客车若干辆,则刚好坐满;若单独租用55座客车,则可以少租一辆,且余45个空座位.

(1)求该校八年级学生参加社会实践活动的人数;

(2)已知35座客车的租金为每辆320元,55座客车的租金为每辆400元.根据租车资金不超过1500元的预算,学校决定同时租用这两种客车共4辆(可以坐不满).请你计算本次社会实践活动所需车辆的租金.

答案

(1)175人  (2)1440元

题目分析:27.(1)设单独租用35座客车需x辆,由题意得:

,

解得:.

(人).  

答:该校八年级参加社会实践活动的人数为175人.

(2)设租35座客车y辆,则租55座客车()辆,由题意得:              

,                      

解这个不等式组,得

y取正整数,

y = 2.

∴4-y = 4-2 = 2.

∴320×2+400×2 = 1440(元).

所以本次社会实践活动所需车辆的租金为1440元.

点评:用方程解决实际问题,关键是把实际问题转化成数学问题,找出关系式

单项选择题
问答题 案例分析题

The National Endowment for the Arts recently released the

the results of its “Reading at Risk” survey, which described

movement of the American public away from books and

literature and toward television and electronic media.

According to the survey. “reading is on the decline on every    62.__________

region, within every ethnic group, and at every educational level.“

The day the NEA report released, the U.S. House, in a tie      63.___________

vote, upheld the government's right to obtain bookstore and

library records under a provision of the USA Patriot Act. The

House proposal would have barred the federal government

from demand library records, reading lists, book customer      64.___________

lists and other material in terrorism and intelligence investigations.

These two events are completely unrelated to, yet they      65.___________

echo each other in the message they send about the place of

books and reading in American culture. At the heart

of the NEA survey is the belief in our democratic         66.__________

system depends on leaders who can think critically, analyze

texts and writing clearly. All of these are skills promoted by     67.__________

reading and discussing books and literature. At the same time,

through a provision of the Patriot Act, the leaders of our

country are unconsciously sending the message that reading

may be connected to desirable activities that might        68._________

undermine our system of government rather than helping

democracy flourish.

Our culture's decline in reading begin well before the       69._________

existence of the Patriot Act. During the 1980s' culture wars,

school systems across the country pulled some books from

library shelves because its content was deemed by parents     70.__________

and teachers to be inappropriate. Now what started in schools

across the country is playing itself out on a nation stage and    71.________

is possibly having an impact on the reading habits of the

American public.

在70处填写改错内容。