心电图诊断完全性右束支传导阻滞,最有意义的是()
A.P-R间期0.16s
B.QRS>0.12s
C.电轴右偏
D.V呈rsR型
E.有除极迟缓的S波
参考答案:D
For many online shops, the price of their products can be decreased _______ 30% in the holiday seasons.
A.to
B.of
C.by
D.on
高压引线空试的泄漏电流比带上被试开关时泄漏电流大?遇到这种情况应如何处理?