入库存储作业的原则不正确的是( )。
A.面向通道B.分层堆放C.后进先D.重量对应
参考答案:C
I think the most helpful invention is light bulb. It seeing in the dark, and it gives people more time to work and play every day.
A. used to B. is used to C. is used for
分析复杂心律失常心电图时,应特别注意观察()
A.P波形态及P-R规律性
B.QRS形态及R-R规律性
C.ST段偏移及T波形态
D.P波与QRS波的关系
E.室壁激动时间