问题 单项选择题

The "standard of living" of any country means the average person’s share of the goods and services which the country produces. A country’s standard of living, (1) , depends first and (2) on its capacity to produce wealth." Wealth" in this sense is not money, for we do not live on money (3) on things that money can buy. "Goods" such as food and clothing, and "services" such as transport and " (4) ". A country’s capacity to produce wealth depends upon many factors, most of (5) have an effect on one another. Wealth depends (6) a great extent upon a country’s natural resources. Some regions of the world are well supplied with coal and minerals, and have a fertile soil and a (7) climate; other regions possess none of them.

Next to natural resources (8) the ability to turn them to use. China is perhaps as well (9) as the USA in natural resources, but suffered for many years from civil and (10) wars, and (11) this and other reasons was (12) to develop her resources. (13) and stable political conditions, and (14) from foreign invasion, enable a country to develop its natural resources peacefully and steadily, and to produce more wealth than another country equally well (15) by nature but less well ordered.

A country’s standard of living does not only depend upon the wealth that is produced and consumed (16) its own borders, but also upon what is indirectly produced through international trade. (17) , Britain’s wealth in foodstuffs and other agricultural products would be much less if she had to depend only on (18) grown at home. Trade makes it possible for her surplus manufactured goods to be traded abroad for the agricultural products that would (19) be lacking. A country’s wealth is, therefore, much influenced by its manufacturing capacity, (20) that other countries can be found ready to accept its manufactures.

6()

A.with

B.for

C.to

D.on

答案

参考答案:C

解析:

固定搭配题。本句谓语是“depends...upon”。to a great extent为固定词组,修饰动词,意为“在很大程度上”,是正确答案。

实验题

(16分)NH3在生活生产中用途广泛。

(1)下列关于NH3或氨水的实验能达到目的的是      (填编号)

编号ABCD
 

实验

装置

实验

目的

实验室模拟侯氏制碱法制备NH4HCO3验证NH3易溶于水制备银氨溶液干燥NH3
(2)利用下图装置(气密性良好)在实验室模拟工业合成氨。

①N2和H2通过A装置,A装置的作用除了将气体混合外,还有                 作用。

②实验结束,C中溶液有刺激性气味,C溶液中存在的含氮元素的微粒有                  

③某小组消耗大量的N2和H2,但得到的氨水浓度远低于其他组,可能的原因有       。(至少写出一项。注:实验试剂均未变质。)

(3)为验证氨水具有弱碱性,设计了下列实验,其中能达到实验目的是   。(填编号)

A.在氨水中滴入酚酞,溶液变红色    

B.测定相同浓度的NaOH和氨水溶液的pH

C.将氨水和过量AlCl3溶液混合,产生白色沉淀 

D.用pH试纸测定1mol/L NH4Cl溶液的酸碱性

(4)在实验室初步测定NH3•H2O的电离平衡常数。

①NH3•H2O电离平衡常数的表达式为:K=                          

②限选试剂和仪器:浓度为0.1mol/L 的氨水、0.1000mol/L 盐酸、1.000mol/L 盐酸、酚酞试剂、甲基橙试剂、蒸馏水、酸式滴定管、碱式滴定管、锥形瓶、胶头滴管、pH计、烧杯等(省略夹持仪器)

实验步骤实验目的
步骤1:

①用碱式滴定管取20.00ml 0.1mol/L 的氨水于锥形瓶中,加入几滴                     

                                      

                              ,停止滴定,记录数据。重复测定2-3次。

 

测定氨水的准确浓度。

步骤2:                              

                                   

                                                    
步骤3:通过计算得出氨水的电离常数。

单项选择题