不稳定型心绞痛和非ST段抬高心肌梗死( )之间主要的差别是
A. 心绞痛的严重程度
B. 斑块表面是否存在血栓形成
C. ST段压低持续的时间
D. 冠状动脉造影的结果
E. 肌钙蛋白显著增高(>0.5ng/ml)
下列关于承诺的说法中,正确的是()
A. 承诺可以撤回
B. 承诺既可以撤回也可以撤销
C. 承诺可以撤销
D. 承诺既不能撤回也不可以撤销
After the mother finds a large envelope with all the ____1_____ things the parents gave to the daughter, the mother's attitude _____2_____ completely. Watching the daughter leaving home for _____3____, the mother feels glad and free of the ____4____. The girl leaves a mess in her rooms, and the mother spends quite a long time _____5______ the rooms. When the mother finds a large envelope containing all the memorable things the parents gave to the daughter, the mother ______6______ her attitude.
以下属于合同内容的是( )
A. 标的
B. 质量
C. 价款
D. 违约责任