男性，55岁，心前区阵发性疼痛1个月，多在夜间发作，与活动无关，每次发作15分钟，发作时心电图Ⅱ、Ⅲ、avF导联ST段抬高。首选的治疗药物是

A．乙胺碘呋酮

B．洋地黄类

C．硝酸酯类

D．钙离子拮抗剂

E．β受体阻滞剂

–What’s the price of iphone4S these days?

--It is much ____. You may go and buy one.

A．cheap

B．cheaper

C．low

D．lower