问题 填空题

下图是关于药物华素片(西地碘片)的使用说明书,以下为说明书的部分内容:

华素片(西地碘片)使用说明书

【品名或组成】

品名:西地碘片

组成:华素片

英文名:Cydiodine Tablets

华素片(西地碘片)的主要活性成分是分子碘,含量1.5 mg/片。将碘利用分子分散技术制成分子态西地碘,并含适量薄荷脑等

【贮藏】 遮光、密闭、阴凉处保存

【有效期】 二年

 

(1)根据上述说明和所学知识回答:

①华素片中含有的活性成分是       (写分子式)。

②请推断华素片       (填“是”或“不是”)白色。

(2)某学生为验证华素片中确实含有上述成分,设计实验如下。请填空:

①取一粒药片放入研钵中研碎,再将药粉装入试管并加入约2 mL蒸馏水;向试管中再加入约2 mL       (填选项字母),并用力振荡。

A.酒精(密度比水小,与水以任意比混溶)

B.四氯化碳(密度比水大,不溶于水)

②描述加入该液体后可能观察到的现象                                  

③选用该液体的原因是                                                         

(3)请再设计另一种方法,验证华素片中的成分(请叙述实验原理、操作方法和实验结论)                                                

答案

(1)①I2 ②不是

(2)①B ②液体分层,下层呈紫红色,上层几乎无色 ③与水不互溶不反应且分层,I2在CCl4中的溶解度比在水中的大,且不与I2反应

(3)将药片研成粉末,放在干燥试管中加热,观察试管口有无紫色蒸气产生,冷却后试管口是否有紫黑色固体产生

本题是以I2的基本性质为载体的实验探究题,综合考查碘单质的性质,包括颜色、碘水颜色、碘的有机溶剂颜色,以及萃取剂选择的理由,都属一些识记性知识。

阅读理解
The Spring Festival is celebrated not only in China but also in other parts of the world. The traditional holiday is the most important to Chinese both at home and abroad.
United Kingdom
Celebrations for the Spring Festival in the UK started in 1980, with the first evening party held in 2002. Every new year, people get together and have a lot of activities. They sing songs, dance to music, share photos with friends or enjoy films in a cinema.
United States
The Spring Festival has become a key time for Chinese living or working in the US. They join in a large evening party to welcome the traditional new year. It is a good chance for people to build a circle of friends and feel that they are not alone because they share the same culture and values.
Australia
The Chinese new year will be welcomed with three weeks of celebrations across Australia. Many people come to Sydney’s Chinatown or Little Bourke in Melbourne. They enjoy fireworks, lion dances, dragon boat and many other traditional activities. The celebrations are also a bridge towards better understanding between Chinese and non-Chinese.
Singapore
The family dinner on new year’s eve is an important tradition for Chinese whether they were born in Singapore or moved there from China. They place traditional food on a table as an act of remembering their past. Then the whole family enjoy their dinner together. They usually hold it at home because having it in a restaurant takes away the meaning of the tradition.
小题1: Celebrations for the Spring Festival in the UK started in ___________.
A.1890B.1980C.2000D.2002
小题2: At the Spring Festival, American Chinese join in a large evening party to _________.
A.say hello to the traditional new year
B.refuse a good chance
C.tell others they are alone
D.share different cultures
小题3:. Chinese in Australia enjoy the following activities except _________.
A.fireworksB.lion dances
C.trick or treatD.dragon boat races
小题4: In Singapore, Chinese families don’t hold the new year dinner at a restaurant but at home because___________.
A.they want to keep Chinese tradition
B.the restaurant is far away
C.they moved there from other places
D.they were born in Singapore
小题5: After reading the passage above, we might say__________.
A.all parts of the world celebrate the Spring Festival
B.the Chinese new year is celebrated only in China
C.celebrations for the Spring Festival are just held in four foreign countries
D.Chinese across the world have a strong feeling towards the Spring Festival
单项选择题