问题 单项选择题

某硬磁盘有5个记录面,记录面上有效记录区域的内径为10cm,外径为30cm。磁道上记录的位密度为250bit/mm,道密度为10道/mm,每一磁道上分为16个扇区,每个扇区记录1KB(字节),磁盘旋转速度为10000转/分。则该硬磁盘的非格式化容量约为 (236) MB;格式化容量约为 (237) MB;该硬磁盘的数据传输速率约为 (238) MB/S。

A.3.1
B.2.6
C.2.2
D.1.8

答案

参考答案:B

解析: 硬盘的非格式化容量的计算式为:记录面数×磁道数×磁道周长×位密度,本题结果约为94MB。硬盘的格式化容量的计算式为:记录面数×磁道数×磁道扇区数目×扇区容量,本题中结果约为78MB。数据传输率的计算式为:磁盘旋转速度×每道扇区数×扇区容量,本题结果约为2.6MB/s。

阅读理解

The quest for success always begins with a target. As Berra once said, “You got to be very careful if you don't know where you're going, because you might not get there.”

Too many people wander through life like sleepwalkers.Each day they follow familiar routines, never asking, “What am I doing with my life?” and they don’t know what they’re doing because they lack goals.

Goal-setting is a focusing of the will to move in a certain direction.Begin with a clear conception of what you want.Write down your goals and date them—putting them into words clarifies them.Rather than concentrating on objects to acquire and possess, focus on fulfilling your desires to do, to produce, to contribute—goal-setting that yields the true sense of satisfaction we all need.

It’s important to visualize(想象)yourself accomplishing your goal.While losers visualize the penalties(不利)of failure, winners visualize the rewards of success.I’ve seen it among athletes, statistics contrasting air and highway safety, but it made no difference.I had read too many articles describing crash scenes and imagined these scenes vividly.I had programmed myself, without realizing it, to stay off planes.

Then one summer I had the opportunity to fly on a private plane with friends to a resort;I didn’t want to miss out on a great vacation.So I spent two weeks imagining a smooth flight on a beautiful sunny day and an easy landing.

When the day arrived, I was eager to go.To everyone’s surprise, I got on the plane and I loved every minute of it, and I still use the techniques I employed that day.

小题1:According to the passage, if you want to be successful, the first thing for you to do is   ________.

A.find the right methods

B.be careful about everything

C.know your ability

D.have a clear goal小题2:If you have a target, you will ________.

A.wander like a sleepwalker

B.know well what you are doing

C.do the same work every day

D.put it into words小题3:The problem with the author before he overcame his fear of air travel is that________.

A.he didn’t know air travel is safer than highway travel

B.he couldn’t imagine himself accomplishing his goal

C.he read too much about plane crashes and tried to avoid flying

D.he wanted to take a private plane instead of a public one小题4:What would be the best title for this passage?

A.Define Your Coal

B.Visualize Rewards of Success

C.Overcome the Fear of Air Travel

D.Sleepwalking Through Life

选择题