第30题: [单项选择]全身骨显像时,根据患者身高采集的总计数是()。 A. 100~200k B. 300~500k C. 900~1000k D. 1500~2000k E. >2500k 参考答案:D 答案解析:全身骨显像的采集参数中,矩阵256×1024,根据患者的身高,以收集总计数1500~2000k为原则,来调整扫描速度。探头尽可能贴近患者。
第35题: [单项选择]A spear or a robot has the quality of technology only when it ______. A. is used both as a cultural and a physical object B. serves different purposes equally well C. is utilized by man D. can be of use to both man and animal 参考答案:C 答案解析:第二段说Until humans use a spear to hunt game or a robot to produce machine parts,表明只有在它们被赋予一定的用途时,才会有实际