题干

已知函数f(x)=asin(πx+α)+bcos(πx+β),且f(2 009)=3,则f(2 011)的值是(   )

A:﹣1

B:﹣2

C:3

D:1

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C

同类题1

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    Natalie Doan, 14, has always felt lucky to live in Rockaway, New York. Living just a few blocks from the beach, Natalie can see the ocean and hear the wave from her house. "It's the ocean that makes Rockaway so special," she says.
    On October 29, 2012, that ocean turned fierce. That night, Hurricane Sandy attacked the East Coast, and Rockaway was hit especially hard. Fortunately, Natalie's family escaped to Brooklyn shortly before the city's bridge closed.
    When they returned to Rockaway the next day, they found their neighborhood in ruins. Many of Natalie's friends had lost their homes and were living far away. All around her, people were suffering, especially the elderly. Natalie's school was so damaged that she had to temporarily attend a school in Brooklyn.
    In the following few days, the men and women helping Rockaway recover inspired Natalie. Volunteers came with carloads of donated clothing and toys. Neighbors devoted their spare time to helping others rebuild. Teenagers climbed dozens of flights of stairs to deliver water and food to elderly people trapped in powerless high-rise buildings.
    "My mom tells me that I can't control what happens to me," Natalie says. "But I can always choose how I deal with it."
    Natalie's choice was to help. She created a website page matching survivors in need with donors who wanted to help. Natalie posted introduction about a boy named Patrick, who lost his baseball card collecting when his house burned down. Within days, Patrick's collection was replaced. In the coming months, her website page helped lots of kids: Christopher, who received a new basketball; Charlie, who got a new keyboard.Natalie also worked with other organizations to bring much-need supplies to Rockaway. Her efforts made her a famous person. Last April, she was invited to the White House and honored as a Hurricane Sandy Champion of Change.
    Today, the scars of destruction are still seen in Rockaway, but hope is in the air. The streets are clear, and many homes have been rebuilt. "I can't imagine living anywhere but Rockaway," Natalie declares. "My neighborhood will be back, even stronger than before."

同类题3

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庄稼乡村

程玉宇

    ①乡村是庄稼和乡村植物的产房。而一年四季的庄稼们,则是乡村粗野的汉子和柔情如水的小媳妇。

    ②春天,漫山遍野金黄色的油菜花,如一幅油画一般,将小小的乡村人家也装进了画框。乡村因此而色彩浓烈艳丽,香气四溢,就连乡村人家门前的那条小溪,那一朵朵蹦起跃下的浪花,也奔流着芬芳的气息。

    ③难怪,我村门前那条瘦弱的小河,便被村人们亲昵地称为“香溪”。

    ④我想,我家乡的河流是一位野丫头,她虽然粗服乱头,布衣荆衩,但她绝对不会流淌什么脂粉之气。她春天从油菜花的原野上流过,夏天从农家的瓜果菜园淌过,秋天又沾了一溪的稻花,一溪的荷香。亦因此,在有月的晚上,在大片大片玉米林叭叭的拔节声中,那条河,那条小溪,便在每一捧流水里,都饱含了乡村原野上五谷杂粮的成熟气味和庄稼的芬芳,不但给整个乡村蕴含了一层朦胧的水汽,也给了乡村女孩儿一股灵秀之气。

    ⑤初夏时节,麦子成熟了,整个大地原野一片金黄。在乳汁一般的月色下,微风吹过,如一片波涛滚滚的大海,把我的小小村子,如一只小船一般,淹没在一片纯粹的麦香之中。而那淡蓝色的远山里,以及小溪流过的白杨树林里,正有一只鸟,如怨妇一般,声声哽咽:我儿种错――!我儿种错――!

    ⑥就在这种鸟的凄厉呼唤声中,庄稼地边涧畔畔上的南瓜花,便在月色里一大朵一大朵悄然开放了。乡村土瓦房前的三两树杏子也在一夜之间变得麦子一般黄亮,第二天一早,那些握着霜刃走向麦田的乡亲们,便在老梁叔的吆喝声中,吃上麦黄杏了。

    ⑦原野上的麦子才收割不久,整个乡村世界和田野上,又被一片片绿得发黑的包谷林覆盖。而村前大河边的那几顷稻田里也一片葱绿,一支才出水不久的小荷上,便站着一只红色的蜻蜓,扇动着薄如蝉翼的翅膀,似坠欲坠又勉强站立的模样,让人顿生怜悯之情。最是月色荡满河川的夜晚,正万簌俱寂,突然一声蛙鸣如冲天炮一般从水田里弹出。瞬间,那千只万只蛙们便像听到了冲锋号似的,全都亮开嗓门鼓噪起来。满世界一片震天动地的蛙声,宏大如乐团,使整个乡村大地和庄稼的原野,都弥漫在一种民间的土地的田园的音乐之中。

    ⑧庄稼,庄稼,无边无沿的庄稼,而庄稼地当中的乡村人家,则如浩瀚的银河系中闪烁的一颗亮星,那么的耀眼,又那么的大音希声,大美无言。

    ⑨当一场凉爽的秋风掠过,粮食们便如排着队伍一般,一垛又一垛地从田野上回到村子,且一疙瘩金黄,一疙瘩鲜亮地挂在农家的屋檐下,或架在我们门前的核桃树柿子树的树枝上。最是那些大豆们,如调皮的孩子似的,老是趁着大人们不注意,便在场院里蹦蹦跳跳的,东藏一颗西躲一颗,逗得三两只花喜鹊总是在庄稼院里一边装模作样地报喜,一边在草丛里,在包谷杆上,在土墙的角落里寻寻觅觅。这时候,乡村大地一片空白,只有涧畔畔上的柿子树们,举起千只万只红灯笼,守望着空荡荡的庄稼大地。一场大雪刚刚下过,太阳一出来,那满天满地的原野上,仿佛是突然在一夜之间,便窜出了一片又一片葱绿色的麦苗,一直绿到天涯。

    ⑩乡村,是庄稼的乡村。

    ⑪而那重复了又重复的春夏秋冬,又总是在一茬又一茬的庄稼和瓜果蔬菜的轮回中,给乡村换上了一层又一层盛装。亦因此,庄稼便成了乡村的血液和灵魂,总是要让乡村的后代繁衍生息,总是要让乡村茁壮地成长。

(选自《到庄稼地里转转》,有改动)