问题 问答题

在2010年5月31日某电视台的《生活与法》节目中,播报了某些网吧给通宵上网的学生提供磷酸可待因糖浆,使学生短时兴奋,但长期服用会导致学生食欲减退、情绪易激动且吸食成瘾的恶果.已知磷酸可待因的化学式为:C18H21NO3•H3PO4.H2O.[提示:CuSO4•5H2O的相对分子质量计算式为:64×1+32×1+16×4+5×(1×2+16×1)=250]

试回答下列问题:

(1)磷酸可待因由______种元素组成;

(2)其相对分子质量为______;

(3)磷酸可待因分子中氢、氧两种元素的质量比为______.

答案

(1)根据磷酸可待因的化学式C18H21NO3•H3PO4.H2O可知,磷酸可待因由:C、H、N、O、P五种元素组成;

(2)磷酸可待因的相对分子的质量为:12×18+21+14+16×3+3+31+16×4+2+16=415;

(3)磷酸可待因分子中氢、氧两种元素的质量比为(1×26):(16×8)=13:64.

故答案为:(1)五;(2)415;(2)13:64.

阅读理解

Nowadays(如今) everyone has a practical goal for life. Do you have one? What’s it? Do you want to become a writer, singer or just become a rich person?

A recent survey shows that in modern society, most people pick up practical goals, such as “earning money to buy a house and a car” , “to improve one’s life quality, “finding a good job”.

Wang You worked in a small firm (商行) in Nanjing. The job was good and he didn’t have to work for extra hours. However he felt the work was not exciting at all and the life was boring. ① So he          ______  _______his job and went to Beijing in February, 2007. When he arrived in Beijing, he set his new goal as finding a good job.

Nowadays more and more people want to live a better life. This fact shows that the society is making progress and people’s life goals have become more practical. One researcher says, “Everybody has his/her own life goal, which will be surely different from people to people. If one is poor, one’s life goal will be to earn more money; if one doesn’t have a diploma(文凭), studying hard to get a diploma will become his life goal; and if one doesn’t have love, his life goal will be to look for it. ②But if one has no life goal, he will idle away(虚度) his lifetime.”

小题1:回答下列问题:Why did Wang You go to Beijing though he had a good job in Nanjing?

____________________________________________________     

小题2:在①的空白处填入适当的单词使句意完整、上下文通顺:__________          

小题3:将②处翻译成汉语_________________________________________________________

小题4:找出文中与下列句子意思相近的句子:

He needn’t work in his spare time because of his good job.

________________________________________________________________________.

小题5:找出或写出文中最能表达短文主题的句子

___________________________________________________________________________

单项选择题 A1/A2型题