问题 选择题

下列物质中属于电解质的是(  )

A.硫酸铜

B.氮气

C.酒精

D.蔗糖

答案

根据电解质的定义可知,硫酸铜溶于水时能形成自由移动的离子,具有导电性,故硫酸铜属于电解质;

氮气是单质不属于能导电的化合物,故不属于电解质;蔗糖和酒精是以分子的形式分散在水中形成的溶液不能导电,也不属于电解质;故选A.

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。

In 1933 an unknown American called Clarence Nash went to see the film-maker Walter Disney. He had a(n)    21    voice and he wanted to work in Disney’s cartoon film for children. When Walter Disney heard Nash’s voice, he said, “Stop! That’s our    22   .”

Disney declared Nash perfect for the role of a talking duck in their upcoming animated short, The Wise Little Hen. The duck, of course, was Donald Duck, which    23    his sailor jacket and hat. Later that year he became a    24    after an eight-minute Mickey Mouse film. The cinema    25    liked him because he was lazy and    26   , and because he    27    his temper very easily. And they loved his voice when he became angry with Mickey’s eight nephews. Soon Donald was more popular than Mickey Mouse himself,    28    because he wasn’t a goody-goody (伪善的人), like Mickey.

Donald Duck went on to become one of the most famous cartoon characters in the world, and a great part of this was due to Nash's distinctive voice. The last film to    29   Nash's famous voice was Mickey's Christmas Carol, released in 1983. And then Donald Duck and his voice    30    — there were no more new cartoons.

21. A. sweet                         B. terrible                 C. unusual                    D. familiar

22. A. film-maker             B. dresser                  C. Mickey                 D. duck

23. A. dressed                 B. wore                     C. sold                      D. took

24. A. star                           B. journalist                  C. sailor                    D. cartoon-maker

25. A. audiences                B. performers            C. directors               D. photographers

26. A. nice                              B. greedy                  C. helpful                        D. sincere

27. A. controlled               B. stood                    C. lost                       D. mastered

28. A. formally                 B. merely                  C. probably               D. scarcely

29. A. ignore                    B. feature                  C. imitate                  D. follow

30. A. changed                  B. formed                 C. trembled                D. Disappeared

单项选择题 B型题