题干

(2015•临沂)计算:
a
a
+
2
﹣
4
a
2
+
2
a
=____ 
上一题 下一题 0.0难度 选择题 更新时间:2013-01-08 10:35:19

答案(点此获取答案解析)

a
-
2
a

同类题4

阅读下文,完成下列小题。

让崇尚英雄成为时代风尚

余荣华

    ①“谁是英雄?今天,我们一起寻找”,5月21日开始,由人民日报社新媒体中心和众多网络媒体共同发起的“崇尚英雄  精忠报国”大型网络互动活动,引发互联网上的传播热潮。与此同时,全国中小学也正在同步开展“崇尚英雄  精忠报国”主题活动。“崇尚英雄”并不是要让孩子去做“力所不能及”的事,而是教导他们从小拥有远大志向、宝贵勇气和拼搏精神。相信,“怎样的人称得上英雄”“用什么方式去报国”会成为孩子们之间热切讨论的话题。

    ②国家也在回应着人民的情感与心声。为了捍卫英烈,《英雄烈士保护法》上月底全票表决通过,并于5月1日起施行。该法庄严宣告:“国家和人民永远尊崇、铭记英雄烈士为国家、人民和民族作出的牺牲和贡献”。

    ③在一个和平的年代,英雄情怀更显珍贵。“崇尚英雄  精忠报国”活动中,有一句话被网友反复点赞:“哪有什么岁月静好,只不过是有人为你负重前行”。军人、警察、维和战士、消防官兵……他们在这些高风险的岗位上默默奉献,不少人为了国家和人民、和平与发展壮烈牺牲。

    ④寻找英雄、崇尚英雄,更要努力成为英雄。新时代的中国,同样需要英雄精神。默默钻研数十载的科技人员、坚守脱贫攻坚第一线的基层干部、累倒在手术台旁的医生、对每个孩子都关怀备至的教师……英雄精神不仅体现在刹那间的生死抉择,而且体现在经年累月的执着坚守。在日常工作中恪尽职守,在普通岗位上埋头苦干,每个人都可以成为“自己的英雄”。

    ⑤“天地英雄气,千秋尚凛然。”无论哪一个时代,英雄的事迹和精神都是激励社会前行的强大力量。期盼“崇尚英雄”成为风尚,荣光永远传承,英雄永不独行。

同类题5

阅读理解

B

    “Can I take your order?”Night after night.I had to say this as l worked in my family's restaurant.My father was a fantastic cook.He wanted me to cook with him.but I didn't like cooking.Because of the restaurant, my father was always busy.He never had time to play soccer with me.

    During my high school and college years,I worked with my family at night.But I always avoided the kitchen.I couldn't wait to graduate (毕业),so I could move away from the family business(生意).Several days before my graduation day, my father and I started looking at new cars.Finally, we found the right car.I was sure that my father would give it to me as my graduation gift.

    On my graduation day, my father gave me a book as a gift.It was his old cookbook.I was so angry that I gave it back to him and ran out of the house.I soon moved away and started my own business.Although I often saw my father during holidays,we never talked about the graduation gift.Then one day, I got a call that my father was sick.I went to see him because l was very worried.

    That night, I looked through my father's books and saw the cookbook that he had given me years before.I carefully opened the cookbook and went through it.Then I found something that made me cry.It was a check(支票)for$30,000 dated(注有日期)the day of my graduation.And the price of the car my father and I chose all those years ago was $30,000.