问题 选择题

通过下列化学反应不能达到目的的是

A.制氯化铁:2Fe + 3CuCl2 = 2FeCl3 + 3Cu

B.用稀硫酸除去炭粉中的少量氧化铜:CuO + H2SO4 = CuSO4 + H2O

C.用氯化钡溶液除去盐酸中的硫酸:H2SO4 + BaCl2 = BaSO4↓+ 2HCl

D.用氢氧化铝治疗胃酸过多症:Al(OH)3 + 3HCl = AlCl3 + 3H2O

答案

答案:A

题目分析:A 铁单质和氯化铜反应生成铜单质和氯化亚铁;B 稀硫酸和氧化铜反应生成可溶性的硫酸铜,和碳粉不反应;C 氯化钡和硫酸反应生成硫酸钡沉淀和氯化氢;D 氢氧化铝和盐酸反应生成绿化铝和水,消耗了胃酸,剩余的氢氧化铝是沉淀,人体无法吸收,可以排除体外。

点评:本题属于对化学常识的考察,近几年中考加大了对化学常识记的考查力度,特别是和生活联系较为紧密的。

完形填空

第二节:完形填空(共20小题;每小题1.5分,满分30分)

In the past, travel was considered an essential part of education. Posts and writers realized the  16  of travel and went out to other countries in search of  17 . A man’s education was not completed until he had visited foreign lands.

That travel  18 the mind cannot be denied (否认). Those who remain within the confines of (在…范围之内) their  19  are cut off from the outside world. As a result, they develop a  20_ outlook on life. But those who travel come into  21  with various types of people whose ways of life are completely 22  theirs. They see things with their own eyes and have a better  23  of the affairs of the world. The impressions that they receive while they travel remain  24  in their minds for many years, and all false impressions and ideas are  25  from their minds. Thus, they are able to  26  things in their proper perspective(观点) and make correct  27  and decisions. And being able to make correct decisions is a valuable part of  28 .

It is argued, however, that the 29  of the great variety of books, newspaper, the radio, TV and the Internet today remove the  30  for travel to acquire knowledge. One would study in the  31  and privacy of one’s own home and absorb all the knowledge that one desires. But there are many things they cannot  32  effectively. For example, the love and respect people in other lands  33  for us and the natural beauty of the various parts or the world cannot be described properly in  34  .They have to be seen and felt. Besides, not all can understand everything that they  35  about people away from their homes. To such people, especially, travel is an important means of education.

16.A. value             B. possibility              C. background                     D. development

17.A. work             B. wealth                  C. opportunity              D. knowledge

18.A. comforts       B. needs                    C. uses                        D. broadens

19.A. sights                 B. homes                   C. careers                   D. powers

20.A. happy                 B. broad                    C. narrow                  D. simple

21.A. sight                 B. contact                  C. power                   D. effect

22.A. different from   B. the same                C. similar with           D. familiar to

23.A. protection         B. study                     C. solution                 D. understanding

24.A. little                 B. endless                  C. fresh                     D. important

25.A. removed           B. tired                             C. differed                 D. separated

26.A. do                             B. see                              C. make                    D. buy

27.A. choices                      B. preparations           C. directions               D. judgments

28.A. life                            B. travel                    C. education               D. society

29.A. presence           B. trouble                  C. importance             D. discovery

30.A. need                 B. intention                C. influence                      D. memory

31.A. library                B. mind                    C. comfort                       D. open

32.A. enjoy               B. describe                 C. write                    D. learn

33.A. satisfy            B. get                              C. own                     D. have

34.A. sounds                B. pens                      C. numbers                  D. words

35. A. see                    B. read                  C. talk                      D. hear

单项选择题