题目

（本小题满分16分） 探究函数的最大值，并确定取得最大值时的值.列表如下： …-0.5-1-1.5-1.7-1.9-2-2.1-2.2-2.3-3… …-8.5-5-4.17-4.05-4.005-4-4.005-4.02-4.04-4.3… 请观察表中值随值变化的特点，完成以下的问题. 函数在区间上为单调减函数； （1）函数在区间                      上为单调递增函数.当                时，                  . （2）证明：函数在区间为单调递减函数. （3）思考：函数有最大值或最小值吗？如有，是多少？完形填空（10分）All over the world people enjoy sports. Sports help people to keep   , happy and to live   . People play different games in winter and summer.     is good for swimming. And in winter people often go skating. Some sports are very     and people everywhere like them. For example, football is very popular. In China, most people, men,      ,boys and girls, like to watch football games. They often talk about them.      and jumping began long, long ago. But basketball and volleyball are rather     . People began to play them not long ago. And people are       new sports or games all the time. Water skiing is one of     . People   different countries may not be able to understand each other, but after a game they often become friends.【小题1】A．healthB．busyC．healthyD．lazy【小题2】A．longB．longerC．happyD．happily【小题3】A．WinterB．SummerC．AutumnD．Spring【小题4】A．boringB．difficultC．expensive D．interesting【小题5】A．womanB．womenC．oldD．young【小题6】A．Run B．RunsC．RunningD．To run【小题7】A．newB．interestingC．popularD．old【小题8】A．startB．playC．playingD．starting【小题9】A．oldest B．newestC．the oldestD．the newest【小题10】A．onB．ofC．forD．at