—Why did you vote for Maggie?—Because she is very ________. She always shares things with others.
A:generous
B:active
C:practical
D:energetic
原始的地球大气与现在的空气在成分上有明显的差别,那时的大气成分主要是( )
若函数fx=logax,x>2-x2+2x-2,x≤2(a>0,a≠1)的值域是(﹣∞,﹣1,则实数a的取值范围是____