Mr. Black _____ for Shanghai in a few days. Do you know when the earliest plane ____on Sunday?

A．leaves; takes off

B．is leaving; takes off

C．is leaving; is taking off

D．leaves; is taking off

促使斑块破裂出血及血栓形成而致心肌梗死的诱因有（）

A.在饱餐特别是进食多量脂肪后，血脂增高，血黏稠度增高

B.先天性畸形

C.晨起6小时至12小时交感神经活动增加，机体应激反应性增强，心肌收缩力、心率、血压增高和冠状动脉张力增高

D.休克、脱水、出血、外科手术或严重心律失常，致心排出量骤降，冠状动脉灌流量锐减

E.重体力活动，情绪过分激动，血压剧升或用力大便时，致左心室负荷明显加重