在△ABC中,∠C=90°,AB>BC的数学道理是______.
∵∠C=90°,
∴BC为点B到AC的垂线段,
∴AB>BC的道理是垂线段最短.
故答案为:垂线段最短.
沿海各地“天后宫”祭祀的主要“神灵”是哪位?
—" _____ are you leaving for Shanghai?"
—"In two days." [ ]
A. How often
B. How long
C. How soon
D. When