题目内容

【单选题】Which is NOT the features of a good resume? _______

A. Readability
B. Proper resume format
C. Being eye-catching
D. Practicability

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【多选题】When emailing your resume, you should put in the body of the email and as an attachment.

A. nothing
B. the cover letter
C. your resume
D. the job advertisement

【多选题】professional resume usually includes.

A. resume heading
B. resume introduction
C. professional experience
D. education and qualifications & skills

【多选题】A job ad usually starts with , then , then to the middle part of job descriptionand ends with contact details.

A. the job title of the open position
B. the company information
C. a greeting
D. job requirements

某计算机的CPU主频为500MHz，CPI为5（即执行每条指令平均需要5个时钟周期）。假定某外设的数据传输率为0.5MB/s，采用中断方式与主机进行数据传送，以32位为传输单位，对应的中断服务程序包含18条指令，中断服务的其他开销相当于2条指令的执行时间。回答下列问题，要求给出计算过程。（1）在中断方式下，CPU用于该外设I/O的时间占整个CPU时间的百分比是多少？（2）当该外设的数据传输率达到5MB/s时，改用DMA方式传送数据。假定每次DMA传送块大小为5000B，且DMA预处理和后处理的总开销为500个时钟周期，则CPU用于该外设I/O的时间占整个CPU时间的百分比是多少？（假设DMA与CPU之间没有访存冲突）？