问题 问答题

现有失去标签的两瓶黄色溶液:碘水和硝酸铁溶液,试鉴别这两种物质,请写出你的鉴别方法(至少填两种,写出三种且正确另加1分)

(1)______

(2)______

(3)______

答案

碘水不能导电而硝酸铁溶液能导电,所以可利用导电性来区分.

碘跟土豆片中的淀粉反应变蓝色,而硝酸铁没有这性质,所以可以利用与淀粉反应来区分.

硝酸铁与氢氧化钠反应生成红褐色沉淀,而碘水没有此性质,由此来区分.

故答案为:

(1)将碘水和硝酸铁溶液滴加到土豆片上,若变蓝色的是碘水,无变化的是硝酸铁.

(2)在两溶液中,滴加氢氧化钠溶液,有红褐色沉淀生成的是硝酸铁,没有的是没有的是碘水.

(3)给两溶液通电,能导电的是硝酸铁溶液,不能导电的是碘水.

听力题

第四部分:写作(共三节,满分45分)

第一节:课文回放:根据课文内容将下面短文补充完整,单词的首字母已经为你写出(注意:在答卷上要写出所填单词的首字母及其它字母的正确形式,否则不给分)。(15分)

☆A  (Unit 1   Book 4  Women of Achievements) ★

Jane Goodall, who had intended to work with animals in their own environment since her (66) c_________, went to (67) A________ and devoted herself to (68) _________ (study) the behavior of chimps. It was tough but she considered it as a (69) w_________ career. Through her study, we learned much more about chimps. She argues that the life of these animals should be (70) r_________ and that they should be left in the wild and not used for (71) e_________ or advertisements. Besides, she was very (72) c__________ of these animals. Now, she has achieved everything she wanted to do, which inspired those who want to cheer the achievements of women.

☆B  (Unit 2  Book 4  Working the Land) ★

Yuan Longping, a man who graduated from Southwest Agricultural College in 1953 and now works the land, does his research and grows hybrid rice. He is an agricultural (73) p_________ to have a high output of rice without (74) e_________ the area of fields. He devotes his whole life to finding ways to increase the rice output, to (75) f_________ the Chinese and the world people. He is (76) c_________ his knowledge so that more farmers can be free from (77) h_______ and satisfied with their lives. Yuan cares little about his money and fame, devoting a great deal of time and money helping others doing agricultural research. He wishes for more cheap rice for all the people. Yuan Longping is a great (78) p_________.

☆B  (Unit 3  Book 4  A Taste of English Humour) ★

Chaplin’s parents were poor music hall performers. It was (79) a__________ that Chaplin was brought up successfully when he was very young. Unfortunately, his parents died, leaving the family even worse off. Chaplin could act the fool doing ordinary everyday tasks. Nobody was ever bored watching him, for he made everything entertaining.

He became known (80) t__________ the world later. He wrote, directed and produced the films he starred in. In 1972, he was given a special Oscar for his outstanding work in films. He spent his last years in Switzerland, where he was buried in 1977.

单项选择题 案例分析题