问题 实验题

(8分)

为确认C6H5OH、H2CO3、CH3COOH的酸性强弱,某同学设计了如下图所示装置,一次实验即可达到目的(不必选用其他酸性物质)。

请据此实验回答下列问题:

(1)仪器D的名称是______________,所盛放的试剂应为             (填化学式);

(2)在烧瓶中装某可溶性正盐溶液,则A中反应的离子方程式是______________;

(3)装置B中所盛的试剂是              ,其作用是                     

(4)装置C中所盛的试剂是          ,C中反应的化学方程式是             _

(5)根据该实验可以得出C6H5OH、H2CO3、CH3COOH这三种物质的酸性强弱顺序为

_________________________________________________。

答案

单项选择题 A3/A4型题
阅读理解

Basic Math introduces students to the basic things of mathematics, as well as some easy methods of learning it. These 30 fantastic courses are designed to provide students with understanding of arithmetic and to prepare them for Algebra (代数) and beyond.

  The lessons in Basic Math cover every basic field of arithmetic. They also look into exponents (指数), the order of operations, and square roots. In addition to that, students also discover how a particular mathematical topic relates to other branches , and how they can be used practically.

  Basic Math starts from easier concepts and gradually moves on to the more troublesome ones.  The lectures offer students the chance to understand of mathematical knowledge that may have seemed so frightening. They also help students prepare for college mathematics and develop confidence in this amazing field of study.

  With the help of these lectures, they will be able to clear away the mystery (神秘性) of mathematics and face their studies with more confidence than they ever imagined. Besides, they will strengthen their ability to accept new and exciting mathematical challenges.

  Professor H. Siegel, honored by Kentucky Educational Television as "the best math teacher in America, " is a devoted teacher and has a gift for explaining mathematical concepts in clear and interesting ways. From the basic ideas to the more difficult problems, he is a master in making math lectures learner-friendlier and less frightening

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小题1:What does the course Basic Math mainly cover?

A.Algebra

B.College Mathematics

C.Arithmetic

D.Mathematics Education小题2: What good things can students expect from Basic Math?

A.Stronger imagination ability.

B.Additional presentation skills.

C.More mathematical confidence.

D.Greater chances of becoming teachers.小题3:What can we learn about Professor H. Siegel?

A.He is a lecturer at Kentucky Educational Television.

B.He is delivering 30 lectures in Basic Math.

C.He works in Georgia State University.

D.He specializes in training teachers.小题4:Where is the passage most likely to have been taken from?  

A.news report

B.A book review

C.A lesson plan

D.An advertisement