问题 选择题

FeS与一定浓度的HNO3反应,生成Fe(NO3)3、Fe2(SO4)3、NO2、N2O4、NO和H2O,当NO2、N2O4、NO的物质的量之比为1:1:1时,实际参加反应的FeS与HNO3的物质的量之比为

A.1:6

B.2:15

C.2:11

D.1:7

答案

答案:D

设生成NO2、N2O4、NO的物质的量均为1mol,则被还原的HNO3物质的量为4mol,共得到6mol电子;1molFeS在反应中失去9mol电子,故被氧化的FeS物质的量为mol,生成物中 Fe2(SO4)3的物质的量是mol,Fe(NO3)3的物质的量也是×(×2)mol,即反应中有mol HNO3生成了盐,因此共有mol HNO3参加反应,实际参加反应的FeS与HNO3的物质的量之比为mol: mol =1:7,D正确。

完形填空

II. 语言知识及应用(共两节,满分35分)

第一节:完形填空(共10小题;每小题2分,满分20分)

阅读下面短文,掌握其大意,然后从21~30各题所给的A、B、C和D项中,选出最佳选项,并在答题卡上将该项涂黑。

A proud father has named his son after a computer software term. Jon Blake Cusack, from Michigan, told local newspapers the US traditional way of adding “Junior” after a boy’s name was too   21  .

So, when his son was born last week, he decided on the name Jon Blake Cusack 2.0, as if he were a __22__ upgrade. Mr. Cusack admitted that it took months to   23   his wife, Jamie, to accept the idea. Mrs. Cusack said she asked several friends whether they can accept this name or not. All the men, she said, felt the name was __24   . However, her women friends did not think so. “I think the women ___25__ like it,” she said.

Mr. Cusack told the local newspaper he got the   26   from a film called The Legend of l900, in which an abandoned baby is given the name 1900 to remember the year of its   27  . “I thought if they could do this. Why can’t we?” After little Jon 2.0 was born, Mr. Cusack even sent a celebratory e-mail to the family and friends designed to look as if he and his wife had   28   a new software.

“I wrote things like there are a lot of new features from Version 1.0 with   29   features from Jamie”, he said. And he is already planning for his son’s future. “If he has a   30  , he could name it 3.0,” he said.

21. A. ordinary                B. usual                  C. normal                    D. common

22. A. software                    B. program                  C. machine                   D. computer

23. A. advise                B. suggest           C. persuade                  D. ask

24. A. cool                          B. bad                   C. out-of-date           D. strange

25. A. take up                     B. add up                        C. end up                     D. get up

26. A. plan                      B. opinion             C. thought                 D. idea

27. A. growth               B. birth               C. name                   D. time

28. A. created              B. founded               C. discovered                  D. found

29. A. newer                B. common            C. additional            D. scarce

30. A. son                        B. child                    C. friend                   D. daughter

单项选择题