题目

（湖南省长沙市一中2010届高三第五次月考） 要求：1。请描述图画内容，写出图片的寓意并发表自己的看法。       2．字数不少于120词。 答案：A painter wants to paint a beautiful tree, but on the dry land where he is living he can’t find a tree with any leaves. Therefore, he has no choice but to add some imaginary leaves to the bear branches of the tree. That is what we can see in the picture. But what does the picture try to tell us? I guess the picture is trying to draw our attention to the worldwide problem of water shortage. 已知函数f(x)=32sin2x-12(cos2x-sin2x)-1（1）求函数f（x）的最小值和最小正周期；（2）设△ABC的内角A、B、C、的对边分别为a、b、c，且c=3，f（C）=0，若向量m=(1， sinA)与向量n=(2，sinB)共线，求a，b．