• 2017贵州免费高考试题库试题及答案-云返教育

    • 设奇函数f(x)在[-1,1]上是增函数,f(-1)=-1.若函数f(x)≤t2-2at+1对所有的x∈[-1,1]都成立,则当a∈[-1,1]时,t的取值范围是
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    • 一个重为100N的物体静止在一个斜面上,斜面的长与斜面的高之比是5:3.把重力分解,请画出力的分解示意图,求出平行于斜面使物体下滑的分力G1和垂直于斜面使物体压紧斜面的分力G2
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    • (1)下列有关元素锗及其化合物的叙述中正确的是         
      A.锗的第一电离能高于碳而电负性低于碳
      B.四氯化锗与四氯化碳分子都是四面体构型
      C.二氧化锗与二氧化碳都是非极性的气体化合物
      D.锗和碳都存在具有原子晶体结构的单质
      (2)铜在我国有色金属材料的消费中仅次于铝,广泛地应用于电气、机械制造、国防等领域.回答下列问题:
      ①铜原子基态电子排布式为
               
      ②用晶体的x射线衍射法可以测得阿伏加德罗常数.对金属铜的测定得到以下结果:晶胞为面心立方最密堆积,边长为361pm.又知铜的密度为9.00g?cm
      -3,则镉晶胞的体积是          cm3、晶胞的质量是          g,阿伏加德罗常数为         
      (列式计算,己知Ar(Cu)=63.6);
      (3)氯和钾与不同价态的铜可生成两种化合物,这两种化合物都可用于催化乙炔聚合,其阴离子均为无限长链结构(如图),a位置上Cl原子的杂化轨道类型为
                .已知其中一种化合物的化学式为KCuCl3,另一种的化学式为         
      (4)金属铜单独与氨水或单独与过氧化氢都不能反应,但可与氨水和过氧化氢的混合溶液反应,其原因是
                ,反应的化学方应程式为         
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    • 已知粗铜中含有少量的锌、铁、银、金等金属和少量矿物杂质(与酸不不反应).某化学兴趣小组在实验室条件下用以硫酸铜溶液为电解液,用电解的方法实现了粗铜的提纯,并对阳极泥和电解液中金属进行回收和含量测定.
      步骤一:电解精制:
      请回答以下问题:
      Ⅰ.电解时,粗铜应与电源的
                极相连.阴极上的电极反应式为         
      电解过程中,硫酸铜的浓度会变小,原因是锌,铁与硫酸铜发生置换反应.
      步骤二:电解完成后,该小组同学按以下流程对电解液进行处理:

      (1)阳极泥的综合利用:
      Ⅱ.稀硝酸处理阳极泥得到硝酸银稀溶液,请你写出该步反应的化学方程式:
               
      残渣含有极少量的黄金,如何回收金,他们查阅了有关资料,了解到了一些有关金的知识,以下是他们获取的一些极其重要的信息:
      序号 反应 平衡常数
      Au+6HNO3(浓)?Au(NO33+3NO2+3H2O <<1
      Au3++4Cl-?AuCl4- >>1
      Ⅲ.从平衡常数的大小可知,金很难与硝酸反应,但却可溶于王水(浓硝酸与盐酸按体积比1:3的混合物),请你简要解释金能够溶于王水的原因:         
      (2)滤液含量的测定:
      以下是该小组探究滤液的一个实验流程:

      Ⅳ.则100mL滤液中Cu
      2+ 的浓度为          mol?L-1
      Ⅴ.则100mL滤液中Fe
      2+的浓度为          mol?L-1
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    • 苯分子中不存在单、双键交替排列的结构,可以作为证据的事实是(  )
      ①苯不能使酸性KMnO
      4溶液褪色 ②苯分子中碳原子之间的距离均相等③苯能在一定条件下跟H2加成生成环己烷④经实验测得邻二甲苯仅一种结构⑤苯在FeBr3存在的条件下同液溴可以发生取代反应,但不因化学变化而使溴水褪色.
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    • 从宏观方面来说物质由元素组成,从微观方面来说物质由粒子构成.下列说法中不正确的是(  )
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    • 汤因比曾这样评价一件史事:“顺利地在旧瓶里装进了新酒,还不至于引起旧瓶爆炸。”并认为:“这可以说是一种宪法方面的胜利,这种胜利应该当作是一种惊人的技艺。”汤因比所评价的是         
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    • Female Chinese space pioneers?
      CHINA plans to recruit(招募) women astronauts thanks to the lobbying(游说) of the leading women’s organization. Gu Xiulian, president of the All-China Women’s Federation(ACWF) (全国妇联), said on Saturday that she put forward a proposal that women be trained for space missions after the manned space flight last October. And it was accepted by the central authorities, local media reported. But the plan to recruit female astronauts has yet to be worked out, according to sources close to the astronaut-training programme.
      Beijing needs mental health care
      MORE than 1,000 people committed suicide(自杀) in Beijing last year, and experts have been encouraging the capital to set up a mental health care system as soon as possible, local media reported last week. About 20 percent of the people of Beijing live in unhealthy conditions, with 3 percent of these suffering from affective disorder and 5 percent reporting symptoms of depression, according to the Beijing Mental Health Service Center.
      No need to fear your licence plate
      CAR licence plates in Shenzhen and Guangzhou, Guangdong Province, will not have the number “four” from this month on ---a move that has led to heated discussion among officials, schools and residents. The word for “four” sounds like “death” in Cantonese. The number has been cleared away from the computer data banks that generate the six-digit licence numbers for local cars. Some say that, for the first time, a public agency service has considered local customs and bans. Others worry it will encourage superstitious(迷信的) beliefs.
      83.We can infer from the news that ____.
      A.there are several female astronauts in China now
      B.people in Guangdong province hate number “four”
      C.the mental disorder concerns everybody all over the country
      D.the city government of Beijing has promised to set up a mental health care system
      84.The underlined sentence in the third news means that __ __.
      A.there is no number “four” in the computers in Shenzhen
      B.computer is used to print six-digit car licence numbers
      C.local cars will be protected to use six-digit car licence numbers
      D.number “four” will no longer appear in the six-digit car licence numbers
      85.What is the message of the first news?
      A.China only needs male astronauts.
      B.Gu Xiulian wants to be the first space woman.
      C.Society doesn’t discriminate(歧视) against women in China.
      D.The proposal of female astronaut training hasn’t been approved.
      86.Which word has the same meaning as the underlined word “symptoms”?
      A.symbol B.signs C.sorts D.shocks
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