问题 单项选择题

16层和16层以上螺旋CT的重建预处理方法中,正确的是()

A.自适应多平面重建

B.扫描交迭采样的修正

C.Z轴滤过长轴内插法

D.扇形束重建

E.多层孔束体层重建

答案

参考答案:A

解析:16层和16层以上螺旋CT的重建与4层螺旋CT不同,都已将孔束边缘部分射线一起计算。预处理方法有自适应多平面重建、加权超平面重建、Feldkamp重建算法。其他选项均是4层螺旋CT的重建预处理方法。

阅读理解

Some people think that success is only for those with talent or those who grow up in the right family, and others believe that success mostly comes down to luck. I’m not going to say luck,talent,and circumstances don’t come into play because they do. Some people are born into the right family while others are born with great intelligence, and that’s just the reality of how life is.

However,to succeed in life,one first needs to set a goal and then gradually make it more practical.And,in addition to that,in order to get really good at something,one needs to spend at least 10,000 hours studying and practicing.To become great at certain things,it’ll require even more time,time that most people won’t put in.

This is a big reason why many successful people advise you to do something you love. If you don’t enjoy what you do ,it is going to feel like unbearable pain and will likely make you quit well before you ever become good at it.

When you see people exhibiting some great skills or having achieved great success,you know that they have put in a huge part of their life to get there at a huge cost.It’s sometimes easy to think they got lucky or they were born with some rare talent,but thinking that way does you no good,and there’s a huge chance that you’re wrong anyway.

Whatever you do,if you want to become great at it, you need to work day in and day out,almost to the point of addiction,and over a long period of time.If you’re not willing to put in the time and work,don’t expect to receive any rewards.Consistent, hard work won’t guarantee you the level of success you may want, but it will guarantee that you will become really good at whatever it is you put all that work into.

小题1:Paragraph 1 mainly talks about ________.

A.the reasons for success

B.the meaning of success

C.the standards of success

D.the importance of success小题2:In Paragraph 2,the underlined word that refers to ______.

A.being good at something

B.setting a practical goal

C.putting in more time

D.succeeding in life小题3:Successful people suggest doing what one loves because ______.

A.work makes one feel pain

B.one tends to enjoy his work

C.one gives up his work easily

D.it takes a lot of time to succeed小题4:What can we infer from Paragraph 4?

A.Successful people like to show their great skills.

B.People sometimes succeed without luck or talent.

C.People need to achieve success at the cost of life.

D.It helps to think that luck or talent leads to success.小题5:What is the main theme of the passage?

A.Having a goal is vital to success.

B.Being good is different from being great.

C.One cannot succeed without time and practice.

D.Luck,talent and family help to achieve success.

单项选择题