A:breaking
B:filling
C:pouring
D:hurrying
____个
—Where are my model planes, mom? —Sorry, I don't know. Oh, look, they are _________.
(I)若曲线y= f(x)在点(1, f(1) )处的切线与X轴平行,求a:
(II)若 f(x) 在x=2处取得极小值,求a的取值范围。
用简便方法计算:﹣9967×14.