计算

计算

答案

解:原式= 2+-1

   = 1

相关题目

下列各句中加点的虚词,使用正确的一句是(   ) A、其实
下列各句中加点的虚词,使用正确的一句是(   ) A、其实,就是在封建时代,有识之士关于官民关系也曾作过显示着进步意义的阐述,有的还付诸行
法国1875年宪法和1871年德意志帝国宪法使两国走上了代议制道
法国1875年宪法和1871年德意志帝国宪法使两国走上了代议制道路。下列关于他们共同点的表述,正确的有(    ) ①国家元首无权任命内阁(政府)成
在2和20之间插入两个数,使前三个数成等比数列,后三个数
在2和20之间插入两个数,使前三个数成等比数列,后三个数成等差数列,则插入的两个数的和为(    )A.-4或17                          
1)生活中处处有化学.如图是小丽收集的某品牌矿泉水标签
1)生活中处处有化学.如图是小丽收集的某品牌矿泉水标签的部分内容,请按要求填写: ①用离子符号表示出其中的一种阳离子 ,一种阴离子②鱼类
    A schoolgirl saved her father's life by kicking him in the chest after h
    A schoolgirl saved her father's life by kicking him in the chest after he suffered a serious allergic (过敏的) reaction which stopped his heart.     Izzy, nine, restarted father Colm's
器官移植的困难是机体对移植器官的排斥,这是因为植入器
器官移植的困难是机体对移植器官的排斥,这是因为植入器官的组织细胞相当于 A.病原体   B.抗原 C.抗体 D.受损伤的组织
  SYDNEY: As they sat sharing sweets beside a swimming pool in 1999 , Shane Go
  SYDNEY: As they sat sharing sweets beside a swimming pool in 1999 , Shane Gould and Jessicah Schipper were simply getting along well , chatting about sport , life and “ anything else that came u
—Where is Bill?                —He ________ Sydney with his fa
—Where is Bill?                —He ________ Sydney with his father.                A. has gone to                          B. has been to  

最新题目