第6题: [单项选择]According to the passage, fatal insomnia _________. A. develops very rapidly. B. is a disease found in Italy. C. is a family disease. D. is an incurable disease. 参考答案:A 答案解析:[注释] 细节题。文章最后一提到“The disease progresses very rapidly.Death comes suddenly.”(这种病来势汹汹。病人通常会突然死亡。),所以正确
第33题: [单项选择]正常情况下,如将脉冲多普勒取样容积置于二尖瓣上左心房腔内,可观察到其舒张期频谱的变化为() A. 正负向双峰频谱 B. 形态与二尖瓣口血流频谱相差较大 C. E/A比值常≤1 D. 频谱幅度低于二尖瓣口血流 E. E/A比值常≥1 参考答案:B 答案解析:取样容积位置可影响频谱幅度与形态,如当取样容积从二尖瓣环向二尖瓣尖移动时,E峰逐渐升高,A峰逐渐降低。