陈旧性心肌梗厂的心电图表现是
A．T波倒置
B．异常ɑ波
C．T波高尖
D．S-T段下移
E．S-T段弓背向上抬高成单向曲线
参考答案：B
变更管理的四个流程总共几个步骤？（）
A、3
B、4
C、5
D、6
— Let's go for a walk, shall we?
— It's too late now; ________, it's beginning to rain. [ ]
A. in addition
B. in a word
C. as a result
D. in general
