题干

下列图像表达正确的是

A:稀硫酸的稀释

B:等量的盐酸与过量的锌粉反应

C:氢气与氧气反应中的能量变化

D:气态氢化物沸点

上一题 下一题 0.0难度 选择题 更新时间:2018-05-24 12:01:49

答案(点此获取答案解析)

B

同类题3

阅读下面文字,完成后面小题。

    现在是个已经是一种小众艺术了,一本诗集、诗刊能印到千份就算多的了。当然,这并不奇怪,全民一起向钱看的时候,诗的位序能排到哪里呢?但是,诗,的确阔过。从西周时代开始“诗”就成为“六经”之一,它是贵族君子必修课之一。诗不仅具有工具性,可以用来侍奉父母和君王,而且它还能成为个人的精神支柱,“兴、观、群、怨”就是指诗歌在人的精神生活领域的力量。一句话可以概括,那时,诗是人们的生活准则,因此,学诗、用诗是一体的。

    那时学诗要学到什么地步呢?用过去的老话说,就是要“融化在血液中,落实在行动上”,这个“行动”孔子特别解释过:“诵诗三百,授之以政,不达;使于四方,不能专对;虽多,亦奚以为?”意思是说,学了诗,对内要能够处理国家政事;对外要能够熟于辞令,这样读诗才有用。春秋时代在外界场合还保持着贵族的肃肃雍雍的礼仪风度,直接利益要求,往往不会赤裸裸直说,而是经常用诗曲折表达。这在《左传》、《国语》里常有记载。人们用诗体现了自身的教养与风度。

    我们考察先秦文献,可以看到贵族君子,甚至没受过多少教育的都邑中居民—国人在对话中也常常熟练地用诗来表达自己的思想感情。我们感到那时的人行事有规范,出言有文采。如《孟子》里的“齐桓晋文之事”章,孟子为齐宣王分析了他看到牛被屠杀之前以羊易牛的心理后,齐宣王说:“诗云‘他人有心,予忖度之。’夫子之谓也。夫我乃行之,反而求之,不得吾心。夫子言之,于我心有戚戚焉。”“他人”两句引得多好,用此赞扬孟子对自己的理解,连自己都说不清楚的,经过孟子剖析入微的解释,连颟顸的齐宣王都觉得深得我心。宋国都邑的居民出口也有文采,看来也是长期受到诗歌教育的民众。宋郑交战,宋国败绩,主帅华元被俘,后来逃了回来,宋国筑城加强防备,华元到工地巡视。筑城的国人编了歌唱道:“睅其目,皤其腹,弃甲而复。于思于思,弃甲复来。”华元支使他的副驾回答国人:“牛则有皮,犀兕尚多,弃甲则那。”筑城人再唱:“从其有皮,丹漆若何。”华元没词儿了,对他的手下说:他们人多嘴多,我们干不过他们,快走吧! 华元尽管仗打败了,人还是很可爱的;宋国国人更可爱,他们出口成章,用诗歌挖苦执政者,表达自己的意见,这正是诗“兴观群怨”职能的表现。

    成为“六艺之首”“王化之基”的“诗三百”经过汉代经师阐释,特别有了《诗大序》、《小序》的《毛诗》,其政治作用更加强化了。“诗三百”基本是四言诗,其体例是风雅颂三体,这成为历代制礼作乐之时乐舞歌词的基本模式,从汉至清没有什么改变,读者有兴趣翻翻正史中的“乐志”,皇皇大典中歌诗基本上是模仿“雅”“颂”的。

(选自王学泰《诗,曾经是一种精神的价值》,有删改)

同类题5

阅读下列短文,从下面每小题的A、B、C、D四个选项中选出最佳选项。

    H. G. Wells lived from 1866 to 1946. He wrote many famous stories. He was best at writing stories about the future. One story is called The Time Machine. Here is the story.

    More than 100 years ago, there was an English scientist and inventor living in London. One day, four friends went to his house for dinner. The inventor was not there. Feeling hungry, they started dinner without him. Then they heard a sound. A few moments later, the inventor came in, looking dirty.

    He told his friends that he built a time machine. He could travel into the future.

    The inventor went thousands of years in the future. He met people called the Eloi. They were smaller than him. They had no machines. Growing fruit and vegetables was all that they did. They had no hobbies. Only one girl, Weena, spoke to him.

    Four days later, he met other people called Morlocks. They lived underground. They caught Eloi people and ate them! The inventor wanted to fight against the Morlocks. The Eloi didn't want to help him, not even the strong men. He tried to fight against the Morlocks. At last, Weena went underground with him. Unfortunately, Weena died.

    After that, he got in his time machine. He came back to his time. Seeing the future made him sad. The people in the future were worse. They were not clever.

    His friends didn't think it was a real story. But they never saw him again. Maybe he went to save the future.