问题 单项选择题

单级中断与多级中断的区别是()

A.单级中断只能实现但中断,而多级中断可以实现多重中断

B.单级中断的硬件结构是一维中断,而多级中断的硬件结构是二维中断

C.单级中断,处理器之通过一根外部中断请求线接到它的外部设备系统,而多级中断,每一个I/O设备有一根专用的外部中断请求线

D.以上都不对

答案

参考答案:C

阅读理解

There is plenty for kids and teens to do in the Syracuse area during the summer, including some great educational opportunities. Here are the top four.

Rosamond Gifford Zoo Camp

The zoo offers separate camps for kids. The camps for kindergarteners run from 9 am to 12:30 pm, and cost $115 for zoo members and $135 for non-members. Kids entering 7th and 8th grades will have half a day from 1 pm to 4:30 pm. The cost is $149 for members and $160 for non-members. All camps feature numerous educational activities and animal encounters. The camps run from August 14 to August 19. Registration starts from July 10 for members and July 15 for non-members.

Active Learning Services at Christian Brothers Academy

From August 1 to August 5, Christian Brothers Academy will host Active Learning Services from USA Chess. Topics of learning will include Chess Camp (age 5-15), and Video Game Creation Program (age 8-15). Chess Camp promises improved chess skills through chess instructors utilizing demo(演示) boards and historic games. Half day sessions will cost $280 for the Computer Camps. A full day of Chess costs $400, and a half day of Chess followed by a half day of Computer Camps cost $430.

Syracuse University Summer College

From July 5th to August 12th , Syracuse University will host pre-college programs for high school students. The Summer College will offer a wide variety of programs including architecture, engineering and computer science, public communications, and eco-fashion. The programs are taught by the teachers of Syracuse University and include hands-on activities. The costs range from $2325 to $7642.

The Sheldon Institute at SUNY Oswego

The State University of New York will hold two-week educational enrichment programs for students entering grades2-4 from July 25 to August 5. Children will have a set program featuring art, science, technology, cultural appreciation and writing. Tuition for the programs is only $320 and a downloadable application is available.

小题1:If a preschool boy and his 8th-grade brother attend the Zoo Camps, they should

pay___________

A.$264

B.$275

C.$295

D.It depends.小题2:When should a child start to attend the Zoo Camps?

A.On July 10

B.On July 15.

C.On August 14.

D.On August 19小题3:What do we know about the Chess Camp from the passage?

A.Children can learn improved chess skills through it.

B.Only children aged 8-15 can attend it.

C.Whole day sessions will cost $250 for it.

D.It will last for two weeks.小题4:Where can children attend the largest number of programs with low cost?

A.Christian Brothers Academy

B.The Sheldon Institute

C.Rosamond Gifford Zoo

D.Syracuse University

单项选择题