下列情况中合并心绞痛时不宜应用硝酸甘油的是()
A.冠心病
B.严重贫血
C.心梗后心绞痛
D.主动脉瓣关闭不全
E.肥厚型梗阻性心肌病
参考答案:E
_____, I have never seen anyone who’s as capable as John.
A.As long as I have traveled
B.Much as I have traveled
C.Now that I have traveled so much
D.As I have traveled so much
反映两个变量之间是否存在线性关系用
A.相关系数表示B.精密度表示C.回归方程表示D.最小二乘法计算E.回收率表示