第26题: [单项选择]Why were female cats usually employed by the Post Office A. They could work for 24 hours a day. B. They were worse hunters. C. They were more persistent hunters. D. They worked the whole night. 参考答案:C
第32题: [单项选择]Who are the two speakers A. Workers. B. Strangers. C. Teachers. 参考答案:B 答案解析:[听力原文] W: Excuse me, can you tell me where Main Street is M: Turn left at the second light and
第37题: [单项选择]典型的二度Ⅰ型房室传导阻滞的心电图表现是 A. PR间期逐渐延长 B. RR间距逐渐缩短 C. PR间期的增量逐次减少 D. 含受阻P波的长RR间距<2倍短RR间距 E. 以上都是 参考答案:E 答案解析:[解析] 典型的二度Ⅰ型房室传导阻滞的表现是PR间期逐渐延长,但PR间期的增量逐次减少,使RR间距逐渐缩短,直至QRS波群脱落出现长RR间距,含受阻P波的长RR间距<2倍短RR间距。