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已知互相垂直的平面α，β交于直线l，若直线m，n满足m∥α，n⊥β，则（）
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源远流长的“礼”文化在漫长的文明演进中，积淀了许多协调处理人与人、人与社会关系的规范和准则。今天，我们仍借助这些规范和准则来协调人际关系、促进社会和谐，但赋予了“礼”平等、友善等新的内涵。这说明文化具有（）
阅读下面短文，掌握其大意，然后从21—40各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题纸上将该选项标号涂黑。During the war,my husband was stationed at an army camp in a desert in California.I went to live there in order to be 21 him. I hated the place .I had never 22 been so unhappy . My husband was ordered out on a long-term duty,and I was left in a tiny shack(棚屋) alone. The heat was 23 -almost 125 0F even in the shade of a cactus(仙人掌)。 24 a soul to talk to . The wind blew non-stop ,and all the food I ate ,and the evry air I breathed,were 25 with sand , sand , sand !I was so sorry for myself that I wrote to my parents. I told them I was 26 and coming back home.I said I couldn’t stand it one minute longer. I 27 be in prison! My father answered my 28 with just two lines-two lines that will always sing in my 29 - two lines that completely changed my life :Two men looked out from prison barsOne saw the mud ,the other saw the starsI read those two lines 30 I was ashamed of myself. I made up my mind I would find out what was good in my present 31 ; I would look for the starsI made friends with the natives,and their 32 amazed me. They gave me presents of their favorite artworks which they had 33 to sell to toueists . I studied the delightful forms of the cactus .I watched for the desert sunsets,and 34 for seashells that had been left there millions of years ago when the desert had been an ocean 35What brought about this 36 change in me ? The desert hadn’t changed , 37 I had .I had changed my 38 And by doing so ,I changed an unhappy experience into the most amazing 39 of my life . I was excited by this new world that I had dicovered I had looked out of my self-creatded prison and 40 the stars 38（）
右图中甲、乙两个体的一对同源染色体中各有一条发生变异（字母表示基因）。下列叙述正确的是（）
韩晓鹏是我国首位在冬奥会雪上项目夺冠的运动员。他在一次自由式化学空中技巧比赛中沿“助滑区”保持同一姿态下滑了一段距离，重力对他做功1900J，他克服阻力做功100J。韩晓鹏在此过程中（）。
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