单项选择。
___ be late again. [ ]
A. You
B. Not
C. Won't
D. Don't
答案：D
较大的根及根茎，坚硬的藤、木类和肉质的果实为便于干燥通常干燥前要（）
A．切片
B．蒸、煮、烫
C. 熏硫
D．发汗
E．干燥
Open Shortest Path First(OSPF)is a (71) routing algorithm that (72) workdone on the OSI IS-IS intradomain routing protocol．This routing，as compared todistance—vector routing，requires (73) processing power．The Dijkstra algorithm is usedto calculate (74) OSPF routing table updates only take place when necessary， (75) atregular intervals．
A．routes B．road C．distance D．cost
