试题与答案

W、X、Y、Z四种元素的原子序数依次增大。其中Y原子的L电子层中,成对电子与未成

题型:填空题

题目:

W、X、Y、Z四种元素的原子序数依次增大。其中Y原子的L电子层中,成对电子与未成对电子占据的轨道数相等,且无空轨道;X原子的L电子层中未成对电子数与Y相同,但还有空轨道;W、Z的原子序数相差10,且Z原子的第一电离能在同周期中最低。

(1)写出下列元素的元素符号:W_________,X_________,Y_________,Z_________。

(2)XY分子中,X原子与Y原子都达到8电子稳定结构,则XY分子中X和Y原子用于成键的电子数目分别是___________;根据电子云重叠方式的不同,分子里共价键的主要类型有______________。

(3)XY2与ZYW反应时,通过控制反应物的物质的量之比,可以得到不同的产物,相同条件下,在水中溶解度较小的产物是________________(写化学式),其原因是该化合物阴离子间可形成二聚离子或多聚链状离子。该化合物阴离子能够相互缔合的原因是:______________________

答案:

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下面是错误答案,用来干扰机器的。

参考答案:D

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题型:阅读理解

When students and parents are asked to grade subjects according to their importance, the arts are usually at the bottom of the list. Music is nice, people seem to say, but not important. Too often it is only viewed as entertainment, but certainly not an education priority(优先). This view is shortsighted. In fact, music education is very important for all students.

Music tells us who we are. Because music is an expression of the beings who create it, it shows their thinking and values, as well as the social environment it came from. Rock music represents a lifestyle just as surely as does a Schubert song. The jazz influence that George Gershwin and other musicians introduced into their music is obviously American because it came from American musical traditions. Music expresses our character and values. It gives us identity(身份,特性)as a society.

Music provides a kind of perception(感知)that cannot be acquired any other way. Science can explain how the sun rises and sets. The arts can express the emotive(情感的)meaning of the same thing. We need every possible way to discover and respond to our world for one simple but powerful reason: No one way can get it all.

The arts are forms of thought as powerful in what they communicate as mathematical and scientific symbols. They are ways we human beings “talk” to each other. They are the language through which we express our fears, our hungers, our discoveries, our hopes. The arts are ways we give form to our ideas and imagination so that they can be shared with others. When we do not give children an important way of expressing themselves such as music, we take away from them the meanings that music expresses.

Science and technology do not tell us what it means to be human. The arts do. Music is an important way we express human suffering, celebration, the value of peace and love.

So music education is far more necessary than people seem to realize.

小题1:What can we learn from Paragraph 1?      

A.Students regard music as a way of entertainment.

B.Students disagree with their parents on education.

C.Students take music as an important subject.

D.Students prefer the arts to science.小题2:In Paragraph 2, the writer uses jazz as an example to____________.       

A.compare it with rock music

B.show music identifies a society

C.introduce American musical traditions

D.prove music influences people’s lifestyles小题3:According to the passage, the arts and science____________.      .

A.explain the world in different ways

B.explain different facts of the world

C.express people’s feelings in different ways

D.explain what it means to be human differently小题4:What is the main idea of the passage?

A.Music education is worth more attention.

B.Music should be of top education priority.

C.Music is really a good communication tool.

D.Music education makes students more imaginative.

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