冬日漫步

       我们一觉醒来，正是冬天的早晨。万籁无声，雪厚厚地堆着，窗槛上像是铺了厚厚的棉花；窗格子显得加宽了，玻璃上结了冰纹，光线暗淡而寂静，更加强了屋内舒适愉快的感觉。早晨的安静，似乎静在骨子里，我们走到窗口，挑了一处没有冰霜封住的地方，眺望田野的景色；可是我们单是走这几步路，脚下的地板已经在吱吱地响。窗外一幢幢的房子都是白雪盖顶，屋檐下、篱笆上都累累地挂满了雪条；院子里像石笋似的站了很多雪柱。大树小树四面八方地伸出白色的手臂，指向天空；本来是墙壁篱笆的地方，形状更是奇怪，在昏暗的大地上，它们向左右延伸，如跳如跃，似乎大自然一夜之间，把田野风景重新设计过了，好让人间的画师来临摹。

       我们悄悄地拔去了门闩，雪花飘飘，立刻落到屋子里来；走出屋外，寒风迎面扑来，利如刀割。星光已经不那么闪烁光亮，地平线上笼罩着一层昏昏的铅状的薄雾。院子里的雪地上，狐狸和水獭所留下的脚迹犹新。这使我们想起：即使在冬夜最静寂的时候，自然界的生物没有一个钟头不在活动，它们还在雪上留下痕迹。把院门打开，脚步轻快，我们跨上寂寞的乡村公路。农舍窗上虽然积雪很多，但是屋里的农夫已经早把蜡烛点起，烛光孤寂地照射出来，像一颗暗淡的星。树际和雪堆之间，炊烟也是一处一处地从烟囱里往上飞升。

       太阳最后总算从远处的林间上升，阳光照处，空中的冰霜都融化，隐隐之中似乎有铙钹伴奏，铙钹每响一次，阳光的威力逐渐增加；时间很快从黎明变成早晨，早晨也愈来愈老，很快地把西面远处的山头，镀上一层金色。我们匆匆地踏着粉状的干雪前进，因为思想感情更为激动，内心发出一种热力，天气也好像变得像十月小阳春似的温暖。假如我们能改造我们的生活，和大自然更能配合一致，我们也许就无需畏惧寒暑之侵，我们将同草木走兽一样，认大自然是我们的保姆和良友，她是永远照顾着我们的。

       大自然在这个季节，特别显得纯洁，这是使我们觉得最为高兴的。残干枯木，苔痕斑斑的石头和栏杆，秋天的落叶，现在被大雪掩盖，像上面盖了一块干净的手巾。寒风一吹，无孔不入，一切乌烟瘴气都一扫而空，凡是不能坚贞自守的，都无法抵御；因此凡是在寒冷荒僻的地方（例如在高山之顶），我们所能看得见的东西，都是值得我们尊敬的，因为它们有一种坚强的淳朴的性格——一种清教徒式的坚韧。别的东西都寻求隐蔽保护去了，凡是能卓然独立于寒风之中者，一定是天地灵气之所钟，是自然界骨气的表现，它们具有天神一般的勇敢。空气经过洗涤，呼吸进去特别有劲。空气的清明纯洁，甚至用眼睛都能看得出来；我们宁可整天处在户外，不到天黑不回家。我们希望朔风吹过光秃秃的大树一般吹彻我们的身体，使得我们更能适应寒冬的气候。我们希望借此能从大自然借来一点纯洁坚定的力量，这种力量对于我们是一年四季都是有用的。

如图，直立于地面上的电线杆AB，在阳光下落在水平地面和坡面上的影子分别是BC、CD，测得BC=6米，CD=4米，∠BCD=150°，在D处测得电线杆顶端A的仰角为30°，试求电线杆的高度（结果保留根号）

下列等式正确的是（　　）

    Differences are important and they should be respected. For example, many important people throughout history were considered different, such as Thomas Edison, Albert Einstein and Abraham Lincoln. They did great things, but some people thought they were strange because they had strong feelings about something. I can understand these people because I've been in that situation before many times.

    It all started in elementary school when I realized that I wasn't like everyone else. My mom says that I have a tendency to be obsessed(着迷)with certain subjects. Unfortunately, these subjects don't interest other kids of my age and they really don't interest my teachers. In fact, my kindergarten teacher said she would scream if I mentioned snakes or lizards one more time while she was teaching the days of the week. I would get into trouble for not paying attention and the teasing began.

    In the third grade, my teacher informed me that I have Asperger's Syndrome（症状）. I said, “So what? Do you know that Godzilla's suit weighs 188 pounds?”

    Later, I asked my mom, “What's Asperger's Syndrome? Am I gonna die?” She said that it's like having blinders on, and that I can only see one thing at a time, and that it's hard to focus on other things.

    People also make fun of me for knowing facts about volcanoes, whales, tornadoes and many other scientific things. My mom says that she has been able to answer many questions on Jeopardy! just by listening to what I have to say, but I've even been laughed at for being smart.

    Maybe someday I'll become a gene engineer and create the real Godzilla. I can dream, Can't I?