She has got two cats now. ______ black and white one is called Rosie and ______ brown one Joseph.

A．The; a

B．A; the

C．The; the

D．A; a

女性，36岁，近期工作较劳累，失眠，今早起床后自觉心跳逐渐加快，伴心慌来诊。心电图检查：心率120次/分，P-R间期0.14s，P波、QRS波群固定联系；Ⅱ、Ⅲ、aVF导联P波直立，aVR导联P波倒置，QRS波群时限0.10s，做Valsalva动作时心率降 1OO次/分，稍后又恢复120次/分。诊断可能是

A．窦房结内折返性心动过速

B．加速性交界性心动过速

C．左心房心律

D．窦性心动过速