问题 问答题

冬天,放在室外的盛满水的玻璃瓶因结冰而被胀破了,对此现象小明进行猜想:物质由液态变成固态时,分子间的距离变大了,所以体积变大了.为了验证自己的猜想,小明进行了下面的实验:

首先,小明以熟动物油为研究对象,把熟动物油放在烧杯里,用火加热使它全部熔化,记下液面所在的刻度位置.然后使其离开火源,冷却后会发现它的中间向内凹陷,这说明它的体积变       ;小明又使用蜡、糖等进行了同样的实验,也得到了同样的结果,小红采用水进行了同样的实验,却得到了相反的结论,发现永结成冰后,体积不仅没有变小,反而变大了.通过以上的猜想和实验,对你有什么启发?

答案

小;在实验中,为了得到较为准确的结论,应选择不同的物质进行实验,这样才能最大限度地避免偶然性,从而能得出较为准确的结论.

多项选择题
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     What exactly is a Dream Career? I am sure it means different things to different people. You could presently be unsure about what your final job would be. If you have any doubts about what your dream career is, you may know which careers you definitely would not like to do. For example, if you have an interest in art, and do not like math, you most certainly would not be an engineer .If you love art. and have no artist talent ,maybe you would like to be around art instead, as an art curator (馆长)

A career related to your passion, bobby, or special interest, is the path to follow in finding your dream job. Try thinking about what things you like to do in your spare time. Many are attracted toward turning what they love to do in their off work hours into a full time job. For example, if you like to put together model cars, maybe you would like opening your own hobby shop, or work for someone who owns one.

Once you find what you arc interested in doing, you can then match this to a career which will be similar to what you are passionate about. What you consider a dream career has to centre around what kind of person you actually are. This is called your Career Personality. What type of person do you consider yourself to be? People are naturally attracted to those things which reflect  who they are as unique individuals. For example, if you are slightly on the shy side, maybe you would like a job where you work on your own. relatively unsupervised ,behind a computer. If you are outgoing, maybe you would like to work with others, and be the supervisor.

All it may take to find our dream career is to know ourselves a little better, trust in our own judgment, and be realistic about what we can attain occupationally: This is how I found what I am doing now.

小题1:What is the main purpose of the passage?

A.To explain what a dream career really is.

B.To offer tips on finding a dream career.

C.To tell us what Career Personality means.

D.To give examples of different personalities.小题2: Which of the following about Career Personality is TRUE?

A.One should choose a dream career by his/her personality.

B.Choosing a dream career depends on a person's ability.

C.One should choose a dream career according to the reality.

D.One should try different types of careers by his/her ability.小题3: Which of the following is what we need to find a dream career?

a. Realizing our ability.

b. Believing in ourselves.

c. Having a better understanding of ourselves.

d. Considering the background of our family.

A.a, c, d

B.a, b, c

C.b, c, d

D.a, c, d小题4:From the second paragraph we learn your dream career has something to do with the

following EXCEPT ______.

A.your hobby

B.your special interest

C.your part-time job

D.your passion小题5:55. It can be inferred from the passage that

A.a dream job is one that most people are fond of

B.people all want to turn their part-time jobs into full-time ones

C.finding our dream career should follow different suggestions

D.the author's present dream job is chosen by his personality