问题 单项选择题 A1/A2型题

在SE序列中,T加权像是指()

A.长TR,短TE所成的图像

B.长TR,长TE所成的图像

C.短TR,短TE所成的图像

D.短TR,长TE所成的图像

E.依组织密度所决定的图像

答案

参考答案:C

解析:在自旋回波脉冲序列(SE)中,选用短TR(<500ms)和短TE(<30ms)时,组织闻的T信号强度差别最大,形成的图像为T加权像;选用长TR(>1500ms)和长TE>80ms)时,组织间的T信号强度差别最大,形成的图像为T。加权像;选用长TR和短TE所得信号既非T也非T,反映了组织间质子密度上的差别,形成的图像为质子密度加权像。

阅读理解

阅读理解。

     Korean popular male artistes Rain who swept Asia recently, had gained popularity among both male and

female fans. Due to his popularity, it has changed the initial plan of Pepsi which does not intend to offer

Korean artistes to be Pepsi's ambassadors. Now they have changed their mind to offer a high price to invite

Rain to be its new" blue blood".

     For the past 2 years, Pepsi had spent enormous amount of fund in search of the world popular super stars,

offering them to be its ambassadors. They include soccer star David Beckham,Taiwan popular idols F4,Jay

Chou, Hong Kong stars Edison Chen, Nicholas Tse,Louis Koo ect. Now with the recent up and rising Korean

Star Rain, Pepsi is quick to put him in its list.

     According to source, Pepsi has recently sent a representative to fly over to Korea to discuss details with

Rain and they are about to sign the contract. Also according to source, Pepsi shall be the sponsor of Rain's

October concert in Hong Kong, but Rain's Hong Kong manager Ms Chan Ka Ying responded,"At this moment,

it's not convenient to talk about this.There shall be a news announcement shortly!"

     As the old Chinese saying "One mountain cannot be ruled by several tigers", Pepsi has somehow created an

internal competition. As Rain's rising popularity is getting strong, the status of Jay, who has the same feature

of"single eye-lid" as Rain, has somehow been affected-there's a rumor that the skin product brand HDC has the

intention to switch from Jay to Rain to be its ambassador, in order to capture Korea, Japan, and China market

to expand its business. Besides being popular for his R&B songs and dance steps, Rain's lead role in " Full

House" has also emotionally touched many Asian women's hearts. He has even successfully penetrated (渗透)

into the mainland China market, the most difficult task. His recent Beijing concert caused a tremendous hit,

resulting in creating"Korean Fever" in mainland China.

1. An "artiste" refers to_____.

A. a professional singer, dancer, actor etc. who performs in a show

B. someone who produces art, especially paintings or drawings

C. someone who sings songs

D. a person that advertises something

2. Who is most likely to be affected by Rain?

A. Jay Chou

B. Louis Koo

C. Mc Chan Ka Ying

D. David Beckham

3.The main reason why Pepsi wants to invite Rain is _______.

A. to help Pepsi sell the skin products

B. to ask him to train their workers

C. to use his influence on people

D. to make him compete with other stars

4.What's the author's attitude towards Rain?

A. Rain is a person with great talents.

B. Rain is too proud to be trusted.

C. Rain should improve his singing skills.

D. Rain shouldn't accept so much money.

5. What does Mr Chan Ka Ying's response mean?

A. Rain don't want to sign the contract

B. They don't want to announce any news until two sides make a deal

C. They hate the media

D. They will announce the news now.

多项选择题