最常应用于治疗冠心病变异型心绞痛发作时的药物是( )
A．乙胺碘呋酮
B．洋地黄类
C．B受体阻滞剂
D．钙离子拮抗剂
E．硝酸酯类
参考答案：D
You can't legally _____ the property until three weeks after the agreement is signed. [ ]
A. hold on to
B. catch hold of
C. take possession of
D. adapt to
E1载波的数据传输为（）
A.1.544Mbps
B.1Mbps
C.2.048Mbps
D.10Mbps
