当np≥5,且n(1-p)≥5时,就可以认为样本容量足够大,样本比例近似服从正态分布。()
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一台气动薄膜调节阀,若阀杆在全行握的50%位置,则流过阀的流量是否也在最大量的50%?
简述YB25包装机“商标纸注胶启用”故障的显示条件、产生的原因及排障措施。
HMI是列车监控系统显示屏的缩写。
A. 正确
B. 错误
Which two statements are characteristics of pin groups?()
A. they are used internally within fcoe to map a vsan to a specifc vlan
B. they pin traffic fro a specific compute node mezzanine card to aspecific up link port
C. an iplink port for the adapter is chosen automatically if no pin group is set