未知题型 Recently, the events of bomb exploding were often happened in the areas of the worlD.Meanwhile, two bombs exploded in Algeria Tuesday as a European Union team met with government leaders to discuss the wave of civilian massacres.One bomb went off at a bus center in the center of the capital of Algiers, killing one person, and an hour later, another bomb blew up in the coastal town of Annaba, killing 3 others. The Algerians agreed to allow EU deputy foreign ministers in to discuss the situation but again, turned down any UN investigation.What happened in Algeria Tuesday?A.A bomb explosion.B.Murder.C.Massacres.D.A civil war.

未知题型 'The risky adventures' means ______.A.expensive adventuresB.dangerous adventuresC.terrible adventuresD.unkind adventures

未知题型 在下列4项中，不属于OSI参考模型7个层次的是( )。D.物理层