题干

若2x2+1与4x2-2x-5互为相反数,则x为(   )

A:-1或23

B:1或-23

C:1或-32

D:1或32

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答案(点此获取答案解析)

B

同类题1

阅读下面的文字,完成文后小题。

书法:彰显中华文化独特魅力

    书法与绘画、音乐等纯艺术门类不同,它不仅仅是艺术,因为书法首先是中国的文字。文字是一个国家文化发展的母体和载体,独一无二的书法无疑是中国文化区别于世界其它文化的标志之一。

    我们对传统的文化、传统的书法要有敬畏之心。中华文明和中国艺术独特性的代表之一,就是我们自古沿用下来的书法。中国的书法拥有五千年的发展历史,它是历代书法家精神的结晶,是我国宝贵的文化遗产,更是中国人智慧的“舍利子”。一个对自己文化都不敬畏的民族何谈自尊。回顾历史,作为文字的书法,是完全实用性的,是人们生活、交往、奏事不可缺少的;但作为艺术,中国古代书家追求法度,追求书卷气、文人气,使书法不仅成为人们用来记叙和表述思想的实际手段,更用书法来体现文人的才情和学养,所谓“字如其人”、“书为心画”。一部书法史,就是一部中国文化发展史,书法艺术延续了近三千年的辉煌,正是中国文化的魅力所在。

    从二十世纪初西方的钢笔进入中国以来近半个世纪,硬笔代替了毛笔,使中国书法渐渐不再具有实用性。尤其是近十多年来,随着电脑的高度发展和普及,这一代年轻人不要说写毛笔字了,甚至即将远离硬笔,进入一个无纸无笔的键盘时代。过去,古人入私塾读书,识字、吟诵、书写三者是合而为一的,是一个不可分拆的整体。但是,在现代教育兴起之后,中国文字的整体性和书卷气的传统被拆解:文字、音韵、书法,成为不同专业;文字归于中文,吟诵归于表演,而书法归于美术。识字作为必修课,书法却成为选修课。而今研究中文的,往往不了解书法;美术学院学书法的,并未开设文字、音韵的课程。

    可见,书法传统在代际绵延中发生了多次重大变化,书法之“法”对于使用毛笔的人来说,越来越隔膜,正因为如此,人们对于书法的认识也越来越混乱。尤其是经历了上个世纪的战乱与运动,书法传统的脉被人为地割裂了,直接造成了今天书法创作、鉴赏与批评的标准不断地泛化甚至是丧失。

    书法不仅是写字,其深层所蕴含的,是中国古人认知世界的一种睿智的方式,是中国文化的一个重要标杆。文化不能遗传和移植,也不能复制和再生,必须从小培养,必须要不断坚持,少则几年、十几年,多则几十年,甚至是一辈子。孜孜不倦、点滴积累,耳濡目染、薪火相传,不然就会在不知不觉中丢失。

    汉字对中国文化来说,是母体,是源头,是根本。书法应是每一个中国人的必修课。弘扬传统书法事业,正是弘扬中华文化最基本的因素,也是“文化安全”的保障所在。在中华民族传统文化重新被呼唤,中华民族精神重新被构建的伟大历史进程中,我们中青年书法家需要不断努力补上传统文化的精深课程,同时发挥自身的影响力,用生命凝结的书法艺术,呼唤出民族文化的新辉煌,全力肩负起我们应该承担的文化责任与历史使命。

同类题3

阅读理解

    Jodie's Daddy is a Garbageman(垃圾清理工)

    Mr Swales wanted to find out what his students' parents did. He had just called Jodie when some girls burst out laughing. Shirley shouted, “Jodie's Daddy is a Garbageman!”

    Everybody in the class laughed out loud, except Jodie. She felt her face turn red.

    “Silence!” Mr Swales said, “Being a garbagemen is a difficult and useful job. We should all be thankful to Jodie's father.”

Jodie's father came to walk her home from school as usual, but she didn't run up to him the way she always did. When they got back home, Jodie went to her room and cried for a long time.

    Her father came into her room, “What happened, Jodie? Why are you so sad?”

    Jodie told her father what had happened and looked at him. He didn't seem angry or hurt. “Well,” he said, “they are right. Being a garbageman is a dirty job. Tomorrow's Saturday. Come to work with me, Jodie.”

    The place really smell too good. Jodie wrinkled her nose. “Don't worry, kid. In five minutes you won't smell a thing.” said her father.

    Everybody there was working hard, and they seemed to have a good time. Jodie's father handed her a pair of gloves and told her to get the little plastic bags and throw them into the truck.

    It was fun, but also hard work. Jodie's arms soom got tired. At last, no more garbage was left and Jodie felt very happy.

    “Garbage is disgusting, but when we clear it away, everything's nice and clean. You can make yourself happy only by making other happy. That's why I like being a garbageman so much.”

    Jodie give her dirty, smeely garbageman daddy a big kiss(吻). She said, “When I grow up, I will be a garbagegirl!”

    Now whenever someone asks Jodie what her daddy does, she says, “He's a garbageman! Everybody makes garbage, but my daddy takes it away!”