A:few; little
B:a few; a little
C:less; fewer
D:fewer; less
将一盆冰水混合物放在阳光下,在冰逐渐熔化的过程中( )
读“五带划分图”回答.
若a>0,b>0,函数fx=4x3-ax2-2bx+2在x=1处有极值,则ab的最大值是( )
估算4+15÷3的运算结果应在( )