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3x+y=52x-y=0,则x+2y=____ 
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同类题1

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    那对过众军汉见了,心内氧起来,都待要吃。数中一个看着老都管道:老爷爷,与我们说一声!那卖枣子的客人买他一桶吃了,我们胡乱也买他这桶吃,润一润喉也好,其实热渴了,没奈何,这里冈子上又没讨水吃处。老爷方便!”老都管见众军所说,自心里也要吃得些,竟来对杨志说:“那贩枣子客人已买了他一桶吃,只有这一桶,胡乱教他们买吃了避暑气。冈子上端的没处讨水吃。”杨志寻思道:“俺在远远处望,这厮们都买他的酒吃了;那桶里当面也见吃了半瓢,想是好的。打了他们半日,胡乱容他买碗吃罢。”杨志道:“既然老都管说了,教这厮们买吃了,便起身。”众军健听了这话,凑了五贯足钱来买酒吃。那卖酒的汉子道:“不卖了!不卖了!这酒里有蒙汗药在里头!”众军陪着笑说道:“大哥,值得便还言语?”那汉道:“不卖了!休缠!”这贩枣子的客人劝道:“你这个汉子!他也说得差了,你也忒认真,连累我们也吃你说了几声。须不关他众人之事,胡乱卖与他众人吃些。”那汉道:“没事讨别人疑心做甚么?”这贩枣子客人把那卖酒的汉子推开一边,只顾将这桶酒提与众军去吃。那军汉开了桶盖,无甚舀吃,陪个小心,问客人借这椰瓢用一用。众客人道:“就送这几个枣子与你们过酒。”众军谢道:“甚么道理!”客人道:“体要相谢。都是一般客人。何争在这百十个枣子上?”众军谢了,先兜两瓢,叫老都管吃一瓢,杨提辖吃一瓢。杨志那里肯吃?老都管自先吃了一瓢,两个虞候各吃一瓢。众军汉一发上,那桶酒登时吃尽了。杨志见众人吃了无事,自本不吃,一者天气甚热,二乃口渴难熬,拿起来,只吃了一半,枣子分几个吃了。那卖酒的汉子说道:“这桶酒被那客人饶了一瓢吃了,少了你些酒,我今饶了你众人半贯钱罢。”众军汉凑出钱来还他。那汉子收了钱,挑了空桶,依然唱着山歌,自下冈子去了。

    那七个贩枣子的客人立在松树旁边,指着这一十五人,说道:“倒也!倒也!”只见这十五个人,头重脚轻,一个个面面厮觑,都软倒了。那七个客人从松树林里推出这七辆江州车儿,把车子上枣子都丢在地上,将这十一担金珠宝贝都装在车子内,遮盖好了,叫声“聒噪!”一直望黄泥冈下推去了。杨志口里只叫苦,软了身体,挣扎不起;十五个人眼睁睁地看着那七个人把这金宝装了去,只是起不来,挣不动,说不得。

    我且问你:这七人端的是谁?不是别人,原来正是晁盖、吴用、公孙胜、刘唐、三阮这七个。却才那个挑酒的汉子,便是白日鼠白胜。却怎地用药?原来挑上冈子时,两桶都是好酒,七个人先吃了一桶,刘唐揭起桶盖,又兜了半瓢吃,故意要他们看着,只是叫人死心塌地,次后吴用去松林里取出药来,抖在瓢里,只做走来饶他酒吃,把瓢去兜时,药已搅在酒里,假意兜半瓢吃,那白胜劈手夺来,倾在桶里,这个便是计策。那计较都是吴用主张,这个唤做“智取生辰纲”。

同类题2

    Good evening, ladies and gentlemen. Welcome to the nine o’clock Mystery Hour. Today we’ll show you two British stories. We hope you'll enjoy them.
    About 900 years ago two green children arrived in a small village in south England. Their eyes and skin were green and they spoke a strange language. They were very tired and weak, so the people of the village looked after them. The boy died a year later, but the girl grew strong and lived the rest of her life there. And her skin color turned back to normal day by day. Scientists say that sometimes of people don't have enough food to eat for a long time, their skin goes very pale and can turn green.
    Loch Ness is the largest lake in Scotland. It’s a very deep and cold lake. For hundreds of years, people have talked about a monster(怪物) called Nessie which lives in the lake. About seventy years ago, two people saw something moving in the lake. They said that the animal was playing and rolling around in the water. Since then many people say they have seen the monster. Their descriptions are always the same. It looks like a dinosaur, with a very long neck and a small head. It has a big bump(肿块)on its back. People have tried to photograph the animal, but the pictures have not been very clear. Scientists don’t know whether there is a monster or not. Some say it may be a whale or a very large fish. Some think it’s a snake. Others say there’s nothing at all— nothing but people’s imagination. Maybe we’ll never know what's in Loch Ness.