Tom is the son of a farm owner. One New Year's Day， when he was 15， his father 1 him to work on the farm for one year when he was free. Tom was 2 with his father's idea. "That isn't my job. I have 3 school work to do. "Hearing this， his father said， "I promise (许诺) to give you the best present if you 4 finish one year's work. "Tom thought for a while and 5.

       Starting one Saturday， the boy got up early and worked 6 until evening， just like any other farmer. Time passed quickly. Tom' s crops (庄稼) grew well. 7 the last day of the year， the father called his son to him. "I'm happy to see that you have worked very hard the whole year，" said the father.  " Now， tell me 8 you want "

    The boy smiled and showed his father a big piece of bread made from his wheat (小麦). "I've already got the 9 present. No pains， no gains. I think this is what you wanted 10 to know.” His father was quite pleased to hear that.

函数f（x）=$\frac{\sqrt{3}}{2}$sin2ωx+cos²ωx﹣$\frac{1}{2}$，ω＞0，x∈R，其相邻两对称轴的距离为$\frac{\mathrm{\pi }}{2}$．

（Ⅰ）确定ω的值；

（Ⅱ）在所给的平面直角坐标系中作出函数f（x）在区间$\frac{\mathrm{\pi }}{6}$，$\frac{11\mathrm{\pi }}{12}$的图象；

（Ⅲ）经过怎样的变换，由函数f（x）的图象可以得到函数y=cosx的图象？写出变换过程．

2016年3月5日，***在政府工作报告中强调，先进文化是健康、科学、向上、代表未来发展方向的文化。在中国当代，发展先进文化，就是建设社会主义精神文明，下列关于发展先进文化观点正确的是（    ）

太阳光垂直照射到一很小的正方形小孔上，则在地面上产生光点的形状是（    ）