题干

鉴别O2、CO、CO2三种气体,可行简便的方法是(    )

A:将气体分别通入澄清石灰水

B:将气体分别通入石蕊试液

C:试验三种气体在水中溶解性

D:用燃着的木条分别伸入瓶内

上一题 下一题 0.0难度 选择题 更新时间:2019-11-26 10:51:46

答案(点此获取答案解析)

D

同类题1

阅读下面的文字,完成下列小题。

    有宋以来,接地气的词、小说、戏曲的兴盛,促成了中国文化的下移,由此导致官方意识形态传播的因时而变。在承袭固有的诗文传播之外,如何使词、小说、戏曲担负起像诗文一样宣传正能量的职责,不仅要突破“诗文为贵,词曲为卑”的陈旧文体观念,更要面对的是文化下移带来的意识形态有效传播途径的探索。

    戏曲与意识形态的传播虽有深刻的关联,但官府因其“不登大雅之堂”而疏于管理。随着戏曲从业人员的壮大,题材内容思想的拓边扩界,“优孟衣冠”式的宫廷娱乐逐渐转为勾栏瓦肆的演出,这导致“违规越礼”之事时时有之。如《墙头马上》,剧中李千金与裴少俊在后花园违规越礼,颇为大胆。此类传播有违儒家教化,这一现象逐渐引起官府的警觉,于是针对戏曲的法律条文也多了起来。“诸妄撰词曲,诬人以犯上恶言者处死”等条文在《元史·刑法志》中有明确的记载。明承元风,逐渐强化。《御制大明律》云:“凡乐人搬做杂剧、戏文,不许装扮历代帝王后妃、忠臣烈士、先圣先贤神像,违者杖一百;官民之家,容令装扮者与之同罪。其神仙道扮及义夫节妇、孝子顺孙、劝人为善者,不在禁限。”

    明初,朱元璋盛推《琵琶记》。《琵琶记》出现之前,蔡伯喈、赵五娘的故事已在社会上广为流传,但内容多为蔡伯喈应试及第,抛亲弃妻,被暴雷轰死。高明感于蔡伯喈行为有违教化,故在“休论插科打诨,也不寻宫数调,只看子孝与妻贤”创作动机的驱使下,把原本负心题材的故事,演绎成“有贞有烈赵贞女,全忠全孝蔡伯喈”的教化剧。

    朱元璋之子朱权,潜心戏曲,援引“治世之音安以乐”,为《太和正音谱》的戏曲文献整理鸣锣开道,并云“杂剧者,太平之胜事,非太平则无以出”。理学家丘濬继承高明戏曲遗风,言“借他时世曲,寓我圣贤言”。清初流传甚广的《桃花扇》与《长生殿》,更是接续“资治通鉴”之史家意识,使情摆脱了晚明一己自由之立场,而放到一己之情与国运相关的宏大叙事之中。

    戏曲传播的一个重要特性是易知易晓。丘濬在《伍伦全备记》开场白中直言,经书所载三纲五常,不如诗歌吟咏性情,容易感动人心。近世以来做成南北戏文,人人观看,皆能通晓,尤易感动人心,使人手舞足蹈不自觉。在感发人心这点上,丘濬不但看到了卑体戏曲与尊体诗歌的一致性,而且体悟到“性情”传播的个体差异性。

    戏曲传播的另一个特性是剧场的群体接受。戏曲批评界崇尚场上之曲,鄙弃案头之书,这种批评旨趣反映了舞台性之于戏曲的重要,而对舞台性的衡量离不开台下受众的接受。丘濬著作中曾记录群体受众的面部表情:“座中观者不下数百人,往往有感动者,有奋发者,有追悔者,有恻然叹息者,有泫然流涕者。”相较于诗文的个体阅读接受,戏曲之剧场的群体接受,更显示出戏曲传播的宽度及其演员、观众互动的特殊性。

(选自《有宋以来戏曲传播的有效利用》,有删改)

同类题4

根据题意,选择恰当的选项填入横线中。

How to become a better runner

  This is meant for runners in high school .If you want to become a better runner, then here are several things you can do.

  Connect with your team if you are new. ____ .You can ask them for advice and hang out with them outside of practice!

  If you have a workout,don’t slack off(松懈) ever.This will never improve your performance .

____ .I know some people say they do it just to stay in shape,but if you want to stay in shape you have to work for it!

  Run 6 out of  the 7 days in a week, but don’t work out on your days off. You need to relax.

____ .It dosn’t have to be as much as you would run during practice, but you should still exercise so that you don’t get out of shape.

  If you are injured, do not run. ____ . It’s common to get shin splints(小腿酸痛), so if this happens to you ,just take a break from running. It will actually make you better once you start running.

    ____ .It allow you to form a relationship with other people like a family. If you take time to become a better runner, you will be physicaaly and mentally(精神上地) stronger.


A, It takes much of your time.

B,Running is more than a sport.

C,Running can make problems worse.

D,It is an experience that you will never forget.

E,But if you are having a long break , you should still run.

F,Remember that you are supposed to run in a running sport.

G,It helps you realize that there is more to just the sport to look forward to.