A:1,+∞)
B:(0,1
C:(0,+∞)
D:(-∞,+∞)
如图表示过氧化氢被分解的曲线,该曲线可说明酶具有( )
世界上华人华侨分布最集中的地区是( )
— ______ people travel every year?
— Perhaps when we are talking about it, more than 100 planes have taken off around the world.