At a talk to some businessmen earlier today, one fellow asked me, Would you give money to a homeless person, even when you know he's going to use it to buy alcohol? I replied, If all was giving
Robert Moody, 52, is an experienced police officer. Much of his work involves dealing with 1 an gang （团伙）problems in the schools of his community. Knowing that many kids often 2 troubl
在点
处的切线方程；
在区间上
的最大值和最小值.
（2）最大值1最小值