下列关于脑实质动静脉畸形的描述,正确的是() A.增强CT扫描时曲张血管增强,占位效

题型:单项选择题

问题:

下列关于脑实质动静脉畸形的描述,正确的是()

A.增强CT扫描时曲张血管增强,占位效应轻或不明显

B.引起脑动静脉畸形的最重要因素是畸形血管的血-脑屏障不完整

C.CT平扫一般显示为高密度影

D.脑动静脉畸形以大脑前动脉分布区高

E.MRI不能显示钙化,诊断价值小于CT

考点:北京住院医师医学影像Ⅰ阶段北京住院医师医学影像(综合练习)北京住院医师医学影像(综合练习)题库
题型:单项选择题

任务型阅读。请从A、B、C、D、E、F六个选项中选出五项与1-5题中的描述一一对应。

_______ 1. Greg loves drums and his favorite is classical music.

_______ 2. Robert plays the violin, his favorite style of music is country music.

_______ 3. James loves the sound of the drum and he likes rock.

_______ 4. Harry says the best instrument is the piano. He likes to listen to opera.

_______ 5. Kevin's favorite instrument is the guitar and his favorite style of music is jazz.

A. He loves to listen to drums. He says he's not a player, just a listener. He claims to like rock.

B. He is violinist, so it's natural that he should favor the violin. He prefers country music.

C. His favorite is the guitar. However, he hasn't played for years, so he keeps hoping to start again. His

    favorite style of music is classical music.

D. He says jazz is his favorite music. He goes to listen to jazz every Friday evening. He also likes opera,

     heavy metal, classical but jazz is the best. He plays the piano, but his favorite instrument is the guitar.

E. He claims the piano is more versatile than any other instrument. He loves to go to see a performance.

    He says opera has everything, color and spectacle and theatre and great music.

F. He played drums when he was at primary school, and now he plays drums with his friends at weekends.

    They have a band. His favorite style of music is classical music.

题型:单项选择题

数据库的物理设计是为一个给定的逻辑结构选取一个适合应用环境的____的过程, 包括确定数据库在物理设备上的存储结构和存取方法。

A.逻辑结构

B.物理结构

C.概念结构

D.层次结构

题型:单项选择题

某城区缺少办公用房,两年前甲公司兼并了该城区中一个有沿街二层标准工业厂房的工厂,兼并后自行将厂房改造、重新装修为办公楼用于出租。现政府将该区段规划改造成办公商务区,上述房屋需拆迁。甲公司为获得最有利的拆迁补偿,向房地产估价机构进行专业咨询。
根据《城市房屋拆迁管理条例》和《城市房屋拆迁估价指导意见》,甲公司开发中心可能提出哪些评估要求对甲公司可能提出的评估要求,房地产估价机构该如何解答

题型:单项选择题

改变电动机极对数的调速方式一般适用于异步电动机。

题型:单项选择题

下列单片机中具有4K-ROM的是()。

A.8751

B.8051

C.8032

D.89C52

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