问题 选择题

下面是某化学反应的微观模型示意图,据此分析错误的是

A.示意图中的各物质均属于化合物

B.反应的本质是原子的重新组合过程

C.分子是由原子构成的

D.反应前后原子数目没有变化

答案

答案:A

题目分析:A根据图示可知:反应前的第二种物质是由同种原子组成的,即由同种元素组成。应为单质。此项错误。B化学变化的过程是原子的重新组合过程。此项正确。C分子是由原子构成的。此项正确。D化学变化的过程是原子的重新组合过程,原子的数目及种类均不发生变化。此项正确。所以应选A项。

单项选择题
阅读理解

阅读理解。

     下面文章中有5处(第1~5题)需要添加小标题。请从以下选项(A、B、C、D、E和F)中选出符合各段意思的小标题,选项中有一项是多余选项。

A. Learn to Evaluate Data Correctly

B. Learn to Speak Clearly and Persuasively

C. Learn to Make Decisions Quickly and Properly

D. Learn to Relax Timely

E. Learn to Use Internet Efficiently

F. Learn to Express Yourself Effectively

Top Tips on How to Succeed in Life

What does it take to succeed in life? Author Dustin M. Wax has compiled a list of the top five skills you

need for a successful life.

1._________

Good writing skills are essential for today's competitive job market. But writing well isn't just a case of

producing grammatically correct sentences - it involves an ability to organize your thoughts, as well as

being able to target your ideas to an audience in the most effective way possible.

2.__________

With so much information out there, you need to be able to sort the potentially valuable data from the

trivial, to analyze its relevance and meaning, and to relate it back to other information.

3. ___________

Analyzing information is all very well, but at some stage you also need to make a decision. Over-analyzing can lead to hesitation, so you need to learn how to respond quickly and effectively, and to know what to

do based on the information available.

4. __________

You don't have to know everything, but you should be able to find out what you need to know quickly

and painlessly. This means learning how to use the internet effectively, how to read productively, and how

to draw on your network of contacts efficiently.

5. __________

Being able to switch off is extremely hard for some people, but you need to find time for exercise or ways of relieving stress and tension, or the pressure could end up literally killing you!