The aromatic ring of __________ undergoes a cycle of oxidation and reduction during the formation of active prothrombin, a blood plasma protein essential in blood clotting.
【简答题】完形填空。 What do you know about the sea? Everybody knows that the sea 1 beautiful when the sun is shining 2 it. But it becomes very terrible when there is a strong wind. If you study the map of the world...