对于右心室肥大的诊断,下列哪项最具诊断价值:( )
A. V导联R/S≥1
B. RVI>1.Omv
C. VAT>0.03秒
D. V1~V3导联ST段压低
洋地黄效应的心电图特征为:( )
A. ST-呈“鱼钩样”改变
B. QRs波群增宽
C. T波倒置
D. p-R间期延长
What is the effect on inventory carrying costs if order size is increased and frequency of orders decreased?
A. costs increase
B. costs decrease
C. costs remain the same
D. the effect cannot be determine
以下不属于库存管理指标体系的是
A. 延期交货
B. 客户满意度
C. 库存周转次数
D. 库存费用