题干

    hungry.

A:am

B:is

C:are

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A

同类题4

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中秋赏月

     每逢中秋来临,赏月玩月便成为人们久谈不衰的话题。有诗道:“明月四时有,何事喜中秋?”为何人们独独钟情于中秋赏月呢? 

     从时令上说,中秋是“秋收节”。自古以来,人们便在这个季节饮酒舞蹈,喜气洋洋地庆祝丰收。从渊源上说,中秋又是“祭月节”,它源于远古人类对自然的崇拜。古代帝王的礼制中有春秋二祭:春祭日,秋祭月。祭月的日子最终就固定在八月十五日。从科学观察来看,此时湿气已去,沙尘未起,空气格外清新,天空特别洁净,月亮看上去既圆又大,恰如古诗所云:“光辉皎洁,古今但赏中秋月,寻思岂是月华别?都为人间天上气清澈。” 

     民间中秋赏月活动约始于魏晋时期,盛于唐宋。浏览唐诗,中秋赏月诗确有多篇,如徐凝诗云:“皎皎秋月八月圆,嫦娥端正桂枝鲜。”宋代,民间中秋赏月之风更加兴盛。《东京梦华录》对北宋京都赏月盛况有这样的描写:“中秋夕,贵家结饰台榭(这里指富贵人家专门搭台),民家争占酒楼,玩月笙歌,远闻千里,连坐至晓。” 

     明清以后,每逢中秋,一轮圆月东升时,人们便在庭院、楼台,摆出月饼、柚子、石榴、芋头、核桃、花生、西瓜等果品上供,边赏月,边畅谈。直到皓月当空,再分食供月果品,其乐融融。 

     碧空如洗,圆月如盘。人们在尽情赏月之际,会情不自禁地想念远游在外、客居异乡的亲人;因此,中秋节还有“团圆节”之称。许多古诗表达了人们此时的思念之情。唐人王建《十五夜望月寄杜郎中》诗云:“今夜月明人尽望,不知秋思落谁家?”中国人历来把家人团圆、亲友团聚,共享天伦之乐看得极其珍贵,历来有“花好月圆人团聚”之谓。 

同类题5

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    See a cell phone cover that you like on Taobao? Forget about placing an order, paying the bill online and waiting for days for it to be delivered to you. In the near future, you'll be able to get it in minutes just by hitting "print" on your computer. You might find it hard to believe that you could actually "print" an object as you would a picture. But it is not that hard to understand how it would work. Just as a traditional printer sprays (喷) ink onto paper line by line, modem 3-D printers spread material onto a surface layer by layer, from the bottom to the top, gradually building up a shape.

    Instead of ink, the materials the 3-D printer uses are mainly plastic, resin (树脂) and certain metals. The thinner each layer is — from a millimeter to less than the width of a hair —the smoother and finer the object will be. This may sound like a completely new technology, but the truth is that 3-D printing has been around since the late 1980s. Back then, it was barely affordable for most people, so few knew about it.

    Last year, though, saw a big change in the 3-D printing industry — printers became much cheaper. For example, 10 years ago a desktop 3-D printer might have cost £20,000, while now they cost only about £ 1,000, according to the BBC. Taken out of the factory and introduced to more diverse and common uses, 3-D printing can create just about anything you can think of --- flutes (笛子), bikinis, jewelry, aircraft parts and even human organs. In fact, scientists from Cornell University in New York have just made an artificial ear using a 3-D printer, according to Science Daily. The fake ear looks and acts exactly like a natural one.

    However, as 3-D printing becomes more common, it may bring about certain problems —such as piracy. "Once you can download a coffee maker, or print out a new set of kitchen utensils (餐具) on your personal 3-D printer, who will visit a retail (零售的) store again?", an expert in 3-D printing told Forbes News. Even more frightening, what if anyone in the world could use a 3-D printer to print out a fully functioning gun?