室性心动过速心电图诊断的最主要依据是
A.房室分离,房率>室率B.心室率100~200次/分C.心室夺获和室性融合波D.心室律稍微不规则E.QRS波群形态宽大畸形
参考答案:C
I wish you'd do talking and some more work. Thus things will become better.[ ]
A. a bit less
B. any less
C. much more
D. a little more
使群钻切削力降低的因素有哪些?