建筑美学可分两种（）和（）。
参考答案：常规美学；象征性美学
函数y＝x2(x＞0)的图象在点(ak，ak2)处的切线与x轴交点的横坐标为ak＋1，k为正整数，a1＝16，则a1＋a3＋a5＝________.
—Good luck to you _____ your trip!
—Thank you _____ your kind words. [ ]
A. to; for
B. with; to
C. with; for
D. to; for
