第2题: [单项选择]A. Put their hands in cold water. B. Put their hands in hot water. C. Report their feelings to the researcher. D. Throw the dollar bills away. 参考答案:B 答案解析:[解析] What were the test subjects in one test asked to do after counting out a stack of 100 dolla
第21题: [单项选择]彩色多普勒血流图像的显示,下列哪项调节与之无关() A. 彩色增益 B. 滤波器 C. 速度标尺 D. 脉冲多普勒的取样容积 E. 取样框大小 参考答案:D 答案解析:彩色多普勒血流图像的显示有关的调节有:彩色图、彩色图速度标尺、滤波器、零位基线、取样框、取样容积、增益、超声频率及余辉。取样容积:彩色多普勒仪有一调节钮"gate",与脉冲多普勒的取样容积"sv"相似,使用较大的gate,可能使血流成像"溢出"于血管外,太小的gate,影响对血流成像的敏感性。