If you still know little about the “IMF”, it’s time you started to read about it, for it has been a hot issue of the whole world． The International Monetary Fund （IMF） is one of the intern
—I played basketball for a whole morning yesterday and felt pretty good. —You will be healthier if you exercise more . A．regularly B．extremely C．fluently
.
时，求函数的最大值和最小值；
的取值范围，使
在区间
上是单调函数。
对称轴
当
或
时，
在
上单调
或
。