题目

已知函数，其中       （1）若为偶函数，求a的值；       （2）命题p：函数上是增函数，命题q：函数是减函数，如果p或q为真，p且q为假，求a的取值范围。   （3）在（2）的条件下，比较的大小。 答案：选词填空：阅读下面材料，用方框中所给单词的适当形式在空白处填空，每词限用一次。每空只能填一词。good say them poor down at but continue hole frogA group of frogs(青蛙) were traveling through the forest, but unluckily two of fell into a hole. The other frogs tried to help them. When they saw how deep the was , they cried to the two frogs that they could not be saved. The two frogs didn't care and tried their to jump up out of the hole. The other frogs kept that they were sure to die. Finally, one of the two heard what the other frogs were saying and gave up. Then he fell and died.However, the other frog to jump as hard as he could. last, he made it out. When he got out, the other frogs asked, "Did you hear us?" The frog, who had a hearing, explained, "I thought you were encouraging me all the time."The story teaches us a lesson: There is power of life and death in the tongue(言语）.An encouraging word to those who are down can help them out a discouraging word can kill them.