颅脑外伤临床表现重,CT表现轻,常提示() ["脑震荡","脑挫裂伤","脑剪切伤","脑出血","蛛网膜下隙出血"]
颅后窝占位病变可引起下列哪种() ["幕下疝","钩回疝","小脑扁桃体疝","海马回疝","扣带回疝"]
关于垂体瘤的描述哪项不正确() ["大腺瘤可突人鞍上池","大腺瘤可导致鞍底下陷","大腺瘤不引起脑积水","腺瘤可侵犯海绵窦","腺瘤可呈哑铃状"]
简要描述外设进行DMA操作的过程及DMA方式的主要优点
下列哪项不符合Ⅱ级星形细胞瘤与胶质母细胞瘤的CT鉴别点() ["病灶占位效应","病灶强化程度","病灶是否均匀强化","病灶形态大小","病灶液化坏死"]
在寄存器—寄存器型,寄存器—存储器型和存储器—存储器型三类指令中,哪类指令的执行时间最长?哪类指令的执行时间最短?为什么?