问题 单项选择题 A1/A2型题

大气中的氧是引起药物制剂氧化的主要因素,下列防止药物氧化措施表述不正确的是()

A.在溶液和容器中通入惰性气体如二氧化碳或氮气,置换水中的氧气,并且二氧化碳的驱氧效果强于氮气

B.对一些受pH值影响较大液体制剂,驱氧时,仍通入驱氧效果较好的二氧化碳

C.对于一些固体药物,可采取真空包装

D.配液时使用新鲜煮沸放冷的注射用水

E.为了防止易氧化药物的自动氧化,在制剂中必须加入抗氧化剂

答案

参考答案:B

解析:空气中的氧是引起药物氧化的主要因素,防止氧化的措施有:配液时使用新鲜的煮沸放冷的注射用水、在溶液中和容器空间通入惰性气体如二氧化碳或氮气,置换水中的氧气、在药物中加入一定的抗氧剂,并且所加抗氧剂不能和药物本身的各成分发生反应、对于一些固体药物,可采取真空包装。虽然二氧化碳的驱氧效果强于氮气,当通入的二氧化碳至饱和时,氧气的残存量是0.05mol.L-1,当通入的氮气至饱和时,氧气的残存量是0.36mol.L-1,但是二氧化碳溶于水中会改变pH值,所以受pH值影响的液体制剂不能用二氧化碳来驱氧。所以答案为B。

阅读理解

The Banquet has been described as a loose adaptation(节选)of "Hamlet", featuring royal conflicts(冲突) and revenge(复仇)which is set in 10th century China. The new Emperor (Ge You) has usurped(篡夺) the throne(帝位)by murdering the previous Emperor. He marries the Empress (Zhang Ziyi), wife of the previous Emperor and stepmother to the Crown Prince (Daniel Wu).

At first, the Empress seeks only to protect herself, but as the new Emperor grows suspicious(疑心) of all those around him, she realizes that only by helping the Crown Prince kill him can she hope to survive. Together with the Chief Minister (Ma Jingwu),she tries to carry out this plot, but when the Prince is destroyed by hesitation, she thinks out a new plan and seeks the throne for herself. As the plot move towards its climax(高潮), the Emperor calls for a plentiful royal banquet, where each will seek the end of their enemies.

The Banquet differs from Hamlet in that it does not focus on the prince, but examines the feelings of each character. According to director Feng Xiaogang: "If Hamlet is about a prince who must make a choice involving life and death, then The Banquet is about how each character must face a choice of life or death... All are motivated by desire, but as soon as they have begun their plans must grow more extreme, and they move step-by-step towards the abyss(深渊)... They do not intend evil, but turn to it out of self-preservation and ever-growing ambition(野心)."

1. As far as we can tell from the text, the Empress ________.

A. She is just the wife of the new Emperor.   

B. She is the later mother of the Crown Prince.

C. She helps her own son to kill the Emperor.  

D. She takes the place of the Emperor finally.

2. The author wants to tell us the following EXCEPT that _______.

A. The new Emperor feels doubt about the affairs around him.

B. The Empress does all she could to survive herself.

C. The Crown Prince shows uncertainty in action.

D. The new Emperor owns the authority all the way.

3. Feng Xiaogang’s words imply(暗示)that ___________.

A. The Banquet is about royal conflicts.    

B. The Banquet’s characters are full of desire.

C. The Banquet involves life and death.    

D. The Banquet is different from the Hamlet.

4. Which of the following is the best title for this text?

A. The Banquet differs from the Hamlet.   

B. The main characters in the play.

C. The plot(情节)of the Banquet.   

D. The ambition of each character.

单项选择题