决定心肌梗死患者预后的最主要因素为()
A.心律失常
B.心功能
C.年龄及病程
D.高血脂及高血压
E.心肌细胞坏死的数量
参考答案:E
(2014届江西省重点中学盟校高三第二次联考英语试卷)27. She cared more about her students than her own health. That’s why two years passed _____ she was treated for breast cancer.
A.since
B.before
C.after
D.until
简述划分不变资本和可变资本的意义。