洋地黄类药物最适用的情况是()
A.扩张型心肌病发生阵速室率心房颤动伴肺淤血
B.肥厚梗阻型心肌病
C.二尖瓣狭窄伴肺淤血
D.心包积液伴呼吸困难
E.主动脉瓣狭窄伴肺淤血
参考答案:A
在用高炉煤气加热时,上升气流空气系统的阻力较用焦炉煤气加热时()
A.小
B.大
C.一样
I hope that the little()I’ve been able to do has been of some use.
A. which
B. what
C. whose
D. that