问题 选择题

图表资料可以为我们提供很多信息。下面是某学生对图表资料使用,其中正确的是

A.根据金属活动性顺序表,解释Mg在空气中燃烧的现象

B.根据酸、碱、盐的溶解性表,判断HCl和NaOH能发生反应

C.根据KNO3溶解度曲线,计算KNO3溶液的质量分数

D.根据元素周期表,查找氧元素的相对原子质量

答案

答案:D

题目分析:根据已有知识分析。

A、根据金属活动性顺序表,可以比较不同金属的活动性的强弱,可以判断金属能否与酸或某些盐的反应,但不能解释Mg在空气中燃烧的现象,错误;

B、复分解反应发生的条件是,生成物中至少要有气体、沉淀或水中的一种,由于盐酸是一种酸,氢氧化钠是一种碱,二者能发生中和反应生成盐和水,故不需要根据酸、碱、盐的溶解性表来判断,错误;

C、根据KNO3的溶解度曲线,可找出KNO3在不同温度下的溶解度,根据其溶解度,可计算该温度下的KNO3饱和溶液的溶质的质量分数,不是任意溶液的质量分数,错误;

D、在元素周期表的一个小格中,元素名称下方的数字是相对原子质量,所以根据元素周期表,可查找氧元素的相对原子质量,正确。故选D

点评:熟练掌握相关图表资料的化学知识,以及它们所提供的相关信息,是解答本题的关键。

阅读理解

As researchers learn more about how children's intelligence develops, they are increasingly surprised by the power of parents.The power of the school has been replaced by the home.To begin with, all the factors which are part of intelligence—the child's understanding of language,learning patterns, curiosity—are established well before the child enters school at the age of six.Study after study has shown that even after school begins, children's achievements have been far more influenced by parents than by teachers.This is particularly true about learning that is languagerelated.The school rather than the home is given credit for variations in achievement in subjects such as science.

In view of their power, it's sad to see so many parents not making the most of their child's intelligence.Until recently parents had been warned by educators who asked them not to educate their children.Many teachers now realize that children cannot be educated only at school and parents are being asked to contribute both before and after the child enters school.

Parents have been particularly afraid to teach reading at home.Of course,children shouldn't be pushed to read by their parents, but educators have discovered that reading is best taught individually—and the easiest place to do this is at home.Many fourand fiveyearolds who have been shown a few letters and taught their sounds will compose single words of their own with them even before they have been taught to read.

小题1:What have researchers found out about the influence of parents and the school on children's intelligence?

A.Parents have greater influence than the school.

B.The school plays a greater role than parents.

C.Parents and the school have the equal power.

D.Neither parents nor the school has any influence.小题2:Researchers conclude that________.

A.it is with the help of the teachers that children have an understanding of

language

B.curiosity is formed after the children enter school

C.children's learning patterns are developed at the early age

D.only the school can give children the opportunity to make achievements小题3:According to the text, in which area may school play a more important role?

A.Moral education.

B.Language education.

C.Physical education.

D.Science education.小题4:Many parents fail to make the most of their children's intelligence because

________.

A.they usually push the children to read at home

B.they only teach them after they enter school

C.they teach them in a wrong way at home

D.they were told by educators not to teach their children

单项选择题