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P波在Ⅱ导联直立，在aVR导联倒置，PR间期>0.12s P波在Ⅱ导联直立，在aVR导联倒置，PR间期<0.12s P波在Ⅱ导联倒置，在aVR导联直立，PR间期>0.12s P波在Ⅱ导联倒置，在aVR导联直立，PR间期<0.12s P波在Ⅱ导联直立，在aVR导联直立，PR间期<0.12s
PR间期与心率成正比 PR间期与年龄成正比 PR间期常<0.12s PR间期<0.12s者占50%以上 以上都对
PR = R vS （KW ） PR= R vS ×10-3 （KW ） PR = R vS ×10³ （KW ） PR= R×10³×vS ×10-3 （KW ）
PR间期与心率成正比 PR问期与年龄成正比 PR间期常<0．12s PR间期<0．12s者占50％以上 以上都对
PR间期>0.12s，QRS波群起始部增宽，时限>0.12s PR间期<0.12s，QRS波群起始部增宽，时限>0.12s PR间期>0.12s，QRS波群终末部增宽，时限>0.12s PR间期<0.12s，QRS波群终末部增宽，时限>0.12s PR间期>0.12s，QRS波群终末部增宽，时限<0.12s
成人PR间期>0.20s 老年人PR间期>0.22s 同一患者心率相同时PR间期延长>0.04s 如果QRS波群形态无异常变化，房室传导阻滞的部位一定在房室结或希氏束 QRS波群形态畸形，房室传导阻滞部位多位于希浦系统
PR间期与心率成正比 PR间期与年龄成正比 PR间期常<0.12s PR间期<0.12s者占50%以上 以上都对
0.12s 0.12～0.20s 0.22～0.24s 0.08～0.12s 0.10～0.12s
0．12s 0．12～0．20s 0．22～0．24s 0．08～0．12s 0．10～0．12s
PR间期与心率成正比 PR间期与年龄成正比 PR间期常＜0.12s PR间期＜0.12s者占50%以上 以上都对
PR间期与心率成正比 PR间期与年龄成正比 PR间期常<0.12s PR间期<0.12s者占50％以上 以上都对
PR间期＜0．12s者占50%以上 PR间期与心率成正比 PR间期常＜0．12s PR间期与年龄成正比 以上都对
0．12~0．20s 0．22~0．24s 0．12s 0．08~0．12s 0．10~0．12s
British companies place more importance on PR than U.S. companies British companies are heavily involved in planning activities British companies are more ambitious than U. S. Four of the world’s top public relations agencies are British-owned
The American PR industry should develop global communication technologies. People involved in PR should avoid suing the word "foreign". American PR companies should be more internationally minded. People working in PR should be more fluent in foreign languages.
enjoy reading a great variety of English business publications speak at least one foreign language fluently are ignorant about world geography are not as sophisticated as their European counterparts
The American PR industry should develop global communication technologies. People involved in PR should avoid suing the word “foreign”. American PR companies should be more internationally minded. People working in PR should be more fluent in foreign languages.
British companies place more importance on PR than U.S. companies British companies are heavily involved in planning activities British companies are more ambitious than U. S. Four of the world’s top public relations agencies are British-owned
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