机组运行中,滞后前滚筒2~4组支架,要及时打出防片帮板。
参考答案:错
Ray is a new graduate, and it seems that he has difficulty in dealing with ________ problems arise.
A.whichever
B.whenever
C.whatever
D.wherever
接入网提供开放的(),兼容任何种类的交换设备,可独立于交换设备进行升级,并能很方便地引入新业务,也易于向宽带网过渡。
A.Z接口
B.U接口
C.V5接口
D.SNI接口