问题 问答题

2006年4~5月间,我省多名患者因注射某制药公司生产的假药“亮菌甲素注射液”而死亡.造成该事件的原因是该制药公司在购买药用辅料丙二醇(C3H8O2)时,购入了二甘醇假冒丙二醇以至酿成悲剧.完成以下填空.

(1)丙二醇的相对分子质量是______.

(2)二甘醇中C、H、O元素的质量比为______.

(3)4n个二甘醇与5n个丙二醇所含氢元素的质量______(填“相同”或“不相同”).

答案

(1)根据丙二醇的化学式(C3H8O2)可知其相对分子质量=12×3+1×8+16×2=76;

(2)根据化合物中各元素质量比=各元素的相对原子质量×原子个数之比,可得二甘醇中碳、氢、氧三种元素的质量比为:12×4:10:16×3=24:5:24

(3)4n个二甘醇所含氢元素的质量可表示为:4n×10=40n,5n个丙二醇所含氢元素的质量可表示为:5n×8=40n,故4n个二甘醇与5n个丙二醇所含氢元素的质量相同.

故答案为:

(1)76; (2)24:5:24;  (3)相同;

阅读理解

任务型阅读。

     Think of life as a game in which you are playing with five balls in the air. You name them work, family,

health, friends and spirit (精神) and you keep all of them in the air. You will soon understand that work is a

rubber ball. If you drop it, it will bounce (弹跳) back.

     But the other four balls, family, health, friends and spirit, are made of glasses. If you drop one of these, they

will be broken. They will never be the same. You must understand that and try to have balance in your life.

How?

     Don't look down on your worth by comparing yourself with others. It is because we are different and each

of us is special.

     Don't let other people set goals for you. Only you know what is best for yourself.

     Don't give up when you still have something to give. (3) Nothing is really over until the moment you stop

trying.

     Don't be afraid to fight difficulties. It is by taking chances that we learn how to be brave.

     Don't shut love out of your life by saying it's impossible. (4) The quickest way to receive love is to give it;

the fastest way to lose love is to hold it too tightly (紧紧地); the best way to keep love is to give it wings.

     Don't run through life so fast that you forget not only where you have been, but also where you are going.

Don't be afraid to learn. Knowledge is weightless (失重的). It's a treasure (珍宝) you can always carry easily.

     Don't use time or words carelessly. You can't get them back.

     Life is not a competition, but a trip, step by step.

     Yesterday is history, tomorrow is a mystery (秘密), and today is a gift: that's why we call it "the present".

A.根据短文内容简要回答问题。

1. What are the five balls of life?

    ______________________________________________________

2. Please say something about knowledge according to the passage.

    ______________________________________________________

B.将短文中画线的两个句子译成汉语。

3. ______________________________________________________

4. ______________________________________________________

C.请给短文拟一个适当的题目。

5. ______________________________________________________

判断题