炉前工在制作渣口泥套时，如果渣口外明火熄灭，应先（）后才可进行操作，以防煤气中毒。
参考答案：点燃明火
Open Shortest Path First(OSPF)is a (71) routing algorithm that (72) work done on theOSI IS-IS intradomain routing protocol. This routing, as compared to distance-vector routing,requires (73) processing power. The (74) algorithm is used to calculate mutes. OSPFrouting table updates only take place when necessary, (75) at regular intervals.
A．derived from
B．deviated from
C．was derived from
D．was deviated from
下列各项中，实行政府定价的有（）。
A.国内汽、柴油出厂价格
B.国内航空煤油出厂价格
C.供军队用汽、柴油出厂价格
D.供国家储备用汽、柴油出厂价格
E.天然气管道运输价格
