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如图,是一块四边形绿地的示意图,其中AB长为24米,BC长15米,CD长为20米,DA长7米,∠C=90°,求绿地ABCD的面积.

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同类题2

阅读《花开的声音》一文,回答下列各题。

花开的声音

陈文和

       花开也有声音么?

       一个夏季的晚上,我在住家的阳台上,就捕捉到昙花开放的声音。那棵昙花的花苞早在两三天前就显露出了雏形,这个“雏形”的花苞越来越大,在枝头垂首有如纺锤。那一夜,我估摸它会开放的,便在阳台彻夜守护着,耐心地等待,等待。近午夜十一时,那美好的时刻终于在焦灼的期待中来到了。它的花苞慢慢地鼓胀起来,好像原先干瘪的汽球一下子灌进了风,紧接着,我便听到一声“噗”的响动,那是我盼望已久的昙花开放的声音。只见那由许多纤长洁白的花瓣组成的花蕊,快速、灿然地开放了。 痴迷间,眼前仿佛跳出了一个长袖善舞的倩女,只一刹那,便羞煞了天际那半轮夏月,那美的光焰,撒向城市街道,使夜的峡谷为之闪闪发亮。。

       除了昙花,我还真切地听到茶花开放的声音。茶花的开放可不是那种“急性子”,早在夏季时,它的蓓蕾就在枝叶间开始孕育,开头只有一粒米那般大小,和叶芽的形状几乎难以分辨,过了好几天,它的雏形才微微显露出来,又再好几天,它那结实的体态和叶芽松动的体态才泾渭分明。茶花花苞的长大,是一个漫长的过程,就像一个长途旅者,走过了夏天,又走过了秋天,到了冬季,那一头尖的椭圆花苞,那花瓣如鳞片重重包裹的花苞,才终于展现在你的面前,但距离开放仍有些日子。我栽在阳台的那一株茶花,叫“五宝茶花”,枝头共有十几个花苞,它们之间好像有个约定,谁先开谁后开。那一天是休息日,我终于看到第一颗准备开放的花苞有些异样了,它在微微地颤动、颤动,仿佛是个睡美人,在阳台上睡了许久、许久,此刻才在深绿色的枝叶间苏醒,惺忪的眼眸,抖动的睫毛,微微地张开,张开。那张开的声音,和昙花的那一声“噗”完全相反,它是那么细微,那么柔和,那么舒缓。昙花开放的声音是短促的,茶花开放的声音是悠长的,不管短促或悠长,都是那么动听,那么迷人。由此我认定:花开的声音是自然界一种最美妙的乐曲,或者说是一种天籁吧!

       花儿这样,世界上一切美好的事物何尝不是如此。当它突然出现时,也会有一种异样的信息,一种类似花开的声音,那是一种文明之花开放的声音。美好事物的孕育、萌发、成熟,也有个渐进的过程,或许中间还会出现一波三折,受到某种压抑和禁锢。当它“破茧而出”或“破墙而出”时,会出现多大的冲击波啊,那一瞬间闪亮的冲击,给人带来的是一种无限的惊喜。这种声音,你只有保持一份纯净、洁白的心态,于细微处才能听到。对于美好的事物,不要有疏离感,要把它置于自己的关爱之下,用自己的羽翼和体温去为它孵化和催生,这样,你就可以及时地听到另一种“天籁”了。

       长时间以来,我都迷恋于谛听各种花开的声音。我始终认为,在人世间,倾述是一种方式,谛听也是一种方式。一个人能听到花开的声音是十分幸福的,因为花开的那一刹那,会最充分地展开事物的内秀和外美,会给你带来一种审美的愉悦和情感的满足。

(选自2011年第1期《南方》,有改动)

同类题3

任务型阅读

    The Chongyang Festival falls on the ninth day of the ninth lunar month and is also called the Double Ninth Festival. As both the month and the day are nine, it got this name. To celebrate the day, people usually climb mountains and enjoy chrysanthemum (菊花), so the festival is also known as the Height Ascending (登高) Festival or the Chrysanthemum Festival. In China, nine has the similar pronunciation with the word “forever”, meaning long life. So the Chinese government set the day as the Seniors' Day.

    The festival has a history of over 2000 years. During the Warring States Period, there was the Chongyang Festival. But it was only celebrated in the imperial palace. From the Han Dynasty, it began to be popular among the common people. The name of the Chongyang Festival first appeared in the Three Kingdoms Period. During the Jin Dynasty, there were customs of enjoying chrysanthemum and drinking wines on the day. It was not (A) officially set as a festival until the Tang Dynasty. Since then, all the people have spent the festival with kinds of activities. In the Ming and Qing Dynasties, people in the imperial palace all ate flower cakes to celebrate. The emperor climbed the mountain on the day as well. In 1989, the Chinese government set the day as the Seniors' Day.

    As September has the clear sky and fresh air, it is a very good time to climb the mountain. There will be a happy sense of excitement by climbing the mountain in this season. Also, it is good for health. Since the Western Han Dynasty, it has been the custom of climbing on the Chongyang Festival.

    On the day, enjoying chrysanthemum is very popular as the flower means long life. Drinking chrysanthemum is regarded as a way to prevent disasters and bad things. Inserting Zhuyu and sticking chrysanthemum are also traditions to avoid the bad as (B) they have special smells which can repel (驱逐) insects and keep out the cold.

    Eating Chongyang cakes is another tradition on the festival. There is no fixed way of the cake but the one with nine layers (层) with two sheep on it is the best. Two sheep means Chongyang. Nine layers show people could do well in everything.