试题与答案

50岁男性,US示肝右叶内1.5cm低回声占位,有包膜,MRI扫描,T1加权像病灶呈

题型:单项选择题

题目:

50岁男性,US示肝右叶内1.5cm低回声占位,有包膜,MRI扫描,T1加权像病灶呈略低信号,T2加权像等信号,除应考虑小肝癌可能外,还应考虑下列哪种疾病

A.血管瘤

B.转移性肝癌

C.黑色素瘤

D.肝脓肿早期

E.肝脏炎性假瘤

答案:

参考答案:E

解析:
肝脏炎性假瘤超声为低回声、T1低信号、T2等信号符合题干影像学表现。肝脏血管瘤超声一般表现为强回声团块,T1低信号,T2高信号;转移性肝癌T1加权像稍低信号,T2加权像稍高信号,肿瘤多呈靶环征象;黑色素瘤T1为高信号,T2低信号;肝脓肿脓腔一般在T1上呈低信号、T2上极高信号,脓肿壁T1的信号强度高于脓腔而低于肝实质,表现为晕环征,T2上脓肿壁周围可因水肿呈高信号,对比增强脓肿壁环形强化。

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题型:阅读理解

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     1970 was World Conservation (保护) Year. The United Nations wanted everyone to know that the world

was in danger. They hoped something could be done.

     Here is one example of the problem. At one time there were 1300 plants and flowers in Holland, but now

only 866 are left. The others have been destroyed (毁坏) by modern man and his science. We are changing

the earth, the air and the water and everything around us. We can't live without these things. If things go on

like this, we shall destroy ourselves.

     What will happen in the future? Perhaps it is more important to ask "What must we do?" More and more

young people have known this. Many of them are helping to save our world. For example, they plant trees. In

a small town in the USA a large group of girls cleaned the banks of 11 kilometres of their river. Young people

may hear about conservation through a song called "No one's going to change our world". It was made by

Cliff Richard and other singers. The money from it will help to conserve tigers, elephants and pandas on the

earth.

1.There're not so many plants, trees and flowers in Holland now because _____. [ ]

A. Holland doesn't need so many plants, trees or flowers

B. people in Holland need more land to live on

C. there has been little conservation there

D. the weather there isn't fit for farming

2.The song called  "No one's going to change our world" encourages people to _____ . [ ]

A. grow more trees and flowers

B. protect our environment and save our world

C. make our life easier and more comfortable

D. save plants and animals on the earth

3.If we go on changing the earth and everything around us, some day _____. [ ]

A. there will be no air on the earth

B. there will be no food for the people

C. we will have to work even harder

D. we will destroy ourselves

4. The word "conserve" in the last sentence means "_____". [ ]

A. help

B. save

C. change

D. destroy

5.The writer warns us _____. [ ]

A. not to be modern man and develop science

B. not to change the animal and plant's life

C. that our world is in danger

D. that people all over the world are in danger

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