With so many other people waiting to buy train tickets，we________gave up and chose to take a flight.[ ]

A．purposefully

B．particularly

C．eventually

D．appropriately

用彩色多普勒技术检测由左向右分流的主动脉窦瘤破裂(流向右心室流出道)有什么特征所见

A．显示有血流信号从窦瘤到左心室
B．显示有血流信号从右心室流向窦瘤
C．显示有血流信号从冠状动脉流向窦瘤
D．显示有血流信号从肺动脉流向窦瘤
E．显示舒张期、收缩期均有从窦瘤流向右心室流出道的信号