问题 单项选择题 B型题

肺错构瘤的CT表现是()

A.肺叶内基底段肿块,上下径较长,增强CT显示主动脉分支供血

B.肺叶内孤立性肿块,类圆形,边缘光滑,CT增强明显强化

C.肺叶内孤立性肿块,分叶短小,毛刺,有空泡征

D.肺叶内孤立性结节,浅分叶,内有"爆米花样"钙化

E.肺叶内单发结节,有钙化,周边有"卫星"病灶

答案

参考答案:D

解析:肺隔离症(pulmonaryseguestration)也称为有异常动脉供血的肺囊肿症,简称"隔离肺",是临床上相对多见的先天性肺发育畸形,占肺部疾病的0.15%~6.4%,占肺切除的1.1%~1.8%,为胚胎时期一部分肺组织与正常肺主体分离单独发育并接受体循环动脉的异常动脉供血。所形成的无呼吸功能囊性包块隔离肺可有自己的支气管,分为叶内型和叶外型,前者位于脏胸膜组织内,其囊腔病变与正常的支气管相通或不相通,临床多见;后者被自己的胸膜包盖,独立于正常肺组织之外,囊腔与正常支气管不相通。

阅读理解

阅读下面短文,从短文后所给各题的四个选项中,选择最佳选项。

       Once a circle lost a piece of its own. The circle wanted to be whole, so it went around looking for its

missing piece. But because it was not complete, it could only roll (滚动) very slowly. It enjoyed the flowers and

the sunshine along the way. It talked with worms. It found lots of different pieces, but none of them fit. So it

left them all by the side of the road and kept on looking for the missing piece. Then one day the circle found a

piece that fit perfectly (完美). The circle put the missing piece into itself. It could be whole with nothing

missing. It was so happy and began to roll. As it was a perfect circle, it could roll very fast, too fast to see

flowers or talk to worms. It realized how different the world was when it rolled so quickly. It felt so sad that it

stopped, left its found piece by the side of the road and rolled away slowly. 

       Sometimes we are perfect when we lose something. A man who has everything is a poor man in some

ways. He will never have hopes, dreams or something better. He will never know someone is loving him or

someone is giving him something he has always wanted or never had.

       We couldn't be perfect, but we must be brave enough to love, strong enough to forgive, kind enough to

share happiness with others and clever enough to know there is enough love around us and then we can always

live a wonderful time in our lives.

1. The circle rolled very slowly because it ________. [ ]

A. spent much time talking to worms

B. wanted to enjoy the sunshine

C. was looking for its missing piece

D. lost a piece of its own

2. Why did the circle stop when it rolled quickly? Because it ________. [ ]

A. wanted to enjoy the world

B. found a different world

C. wanted to look for another missing piece

D. thought the world changed so quickly

3. The story mainly tells us that _______. [ ]

A. nobody loves us if we give nothing

B. a man who has everything is the happiest

C. losing something may not be a bad thing sometimes

D. we are not whole when we lose something

问答题 简答题