题干

李大爷有一块长6.6米,宽4.2米的长方形小菜园,他想用篱笆围起来,需要篱笆多少米?
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答案(点此获取答案解析)

解:(6.6+4.2)×2

=10.8×2

=21.6(米)

答:需要篱笆21.6米

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刘白羽

    但是,我却看到了一次最雄伟、最瑰丽的日出景象。不过,那既不是在高山之巅,也不是在大海之滨,而是从国外向祖国飞航的飞机飞临的万仞高空上。现在想起,我还不能不为那奇幻的景色而惊异。是在我没有一点准备、一丝预料的时刻,宇宙便把它那无与伦比的光华、丰采,全部展现在我的眼前了。当飞机起飞时,下面还是黑沉沉的浓夜,上空却已游动着一线微明,它如同一条狭窄的暗红色长带,带子的上面露出一片清冷的淡蓝色晨曦,晨曦上面高悬着一颗明亮的启明星。飞机不断向上飞翔,愈升愈高,也不知穿过多少云层,远远抛开那黑沉沉的地面。飞机好像惟恐惊醒人们的安眠,马达声特别轻柔,两翼非常平稳。这时间,那条红带却慢慢在扩大,像一片红云了,像一片红海了。暗红色的光发亮了,它向天穹上展开,把夜空愈抬愈远,而且把它们映红了。下面呢?却还像苍莽的大陆一样,黑色无边。这是晨光与黑夜交替的时刻,这是即将过去的世界与即将到来的世界交替的时刻。你乍看上去,黑夜还似乎强大无边,可是一转眼,清冷的晨曦变为磁蓝色的光芒。原来的红海上簇拥出一堆堆墨蓝色云霞。一个奇迹就在这时诞生了。突然间从墨蓝色云霞里矗起一道细细的抛物线,这线红得透亮,闪着金光,如同沸腾的溶液一下抛溅上去,然后像一支火箭一直向上冲,这时我才恍然大悟,原来这就是光明的白昼由夜空中进射出来的一刹那。然后在几条墨蓝色云霞的隙缝里闪出几个更红更亮的小片。开始我很惊奇,不知这是什么?再一看几个小片冲破云霞,密接起来,融合起来,飞跃而出,原来是太阳出来了。它晶光耀眼,火一般鲜红,火一般强烈,不知不觉,所有暗影立刻都被它照明了。一眨眼工夫,我看见飞机的翅膀红了,窗玻璃红了,机舱座里每一个酣睡者的面孔红了。这时一切一切都宁静极了,宁静极了。整个宇宙就像刚生过婴儿的母亲一样温柔、安静,充满清新、幸福之感。再向下看,云层像灰色急流,在滚滚流开,好让光线投到大地上去,使整个世界大放光明。我靠在软椅上睡熟了。醒来时我们的飞机正平平稳稳,自由自在,向我的亲爱的祖国、向太阳升起的地方航行。黎明时刻的种种红色、灰色、黛色、蓝色,都不见了,只有上下天空,一碧万顷,空中的一些云朵,闪着银光,像小孩子的笑脸。

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阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。

    Designer Susan McLeary is taking the jewelry world by storm with her jewelry made from living plants. She uses real succulents(多肉植物)collected from her 1 to create wonderful headpiece, necklaces, rings bracelets, and other pieces of bio-jewelry that literally 2 on you.

    Each piece from McLeary's 3 can be worn for two to four weeks before the plants begin to 4 in their metal base. When this happens, wearers can 5 remove the succulents from their metal base and re-pot them to keep in their homes. The jewelry bases can still be 6 as usual. If the pieces are worn for special 7 like weddings, the potted plants become all the more 8.

    McLeary, who has worked with leading floral designers(花艺设计师)across the US, has spent years 9 her two loves — plants and jewelry — and 10 her own style. Before she was a florist, she made jewelry for friends. 11 one of her friend got married, she was asked to design some wedding flowers 12 some jewelry. As she had her friend's flowers in her hands, she knew she had got her idea. She still loves 13 for weddings, but she has found that she enjoy creating floral wears and floral 14 even more.

    She makes each piece by hand, and 15 she can pay careful attention to composition and color. Each jewelry piece is made with 16 sourced plants from a family owned greenhouse and jewelry bases 17 by other small businesses.

    There is no doubt that the floral jewelry adds more fun and more 18 sights to there occasions. Of course, the wearers can also 19 their time by taking care of the plants on their metal base. McLeary's beautiful designs are 20 on her Easy store, which ranges from $ 20 to $ 300.