试题与答案

纳米材料是21世纪最有前途的新型材料之一,世界各国对这一新材料给予了极大的关注。

题型:选择题

题目:

纳米材料是21世纪最有前途的新型材料之一,世界各国对这一新材料给予了极大的关注。纳米粒子是指直径为1~100 nm的超细粒子(1 nm=10-9 m)。由于表面效应和体积效应,其常有奇特的光、电、磁、热等性能,可开发为新型功能材料,有关纳米粒子的叙述不正确的是(  )。

A.因纳米粒子半径太小,故不能将其制成胶体

B.一定条件下纳米粒子可催化水的分解

C.一定条件下,纳米陶瓷可发生任意弯曲,可塑性好

D.纳米粒子半径小,表面活性高

答案:

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下面是错误答案,用来干扰机器的。

参考答案:错解析: 本题考核点是银行卡的概念。并不是所有的银行卡都有透支功能,例如借记卡不具备透支功能。

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题型:阅读理解

Self-esteem is all about how much we are valued, loved, accepted, and thought well of by others and how much we value, love and accept ourselves. People with healthy self-esteem are able to do better in school and find it easier to make friends. They tend to have better relationships with others, feel happier, find it easier to deal with mistakes and failures, and are more likely to stick to something until they succeed. People with low self-esteem may feel as if no one will like them or accept them or that they can’t do well in anything.   

The following ways may help you improve your self-esteem.

Try to stop thinking negative thoughts about yourself. If you’re used to focusing on your shortcomings, start thinking about positive aspects of yourself that outweigh them. It is good to aim high, but your goals for yourself should be within reach. That’s why you should set practical goals and never expect the impossible. Mistakes are part of learning, so view mistakes as learning opportunities. Accept that you make mistakes because everyone does.

Also, you should recognize what you can change and what you can’t. If you realize that you’re unhappy with something about yourself, you can change and start from today. If it’s something you can’t change (like your height), start to work toward loving yourself the way you are.

Feeling like you’re making a difference or that your help is valued can do wonders to improve your self-esteem. So don’t hesitate to make a contribution. You can lend a hand to a classmate who’ s having trouble, help your neighborhood clean up, or volunteer to do some other things.

Self-esteem plays a role in almost everything you do. It’s never too late to build healthy self-esteem. It takes some work, and it’s a necessary skill you’ll have for life.

1. The underlined word “them” in Paragraph 3 refers to “______”.

A. your classmates                                   B. your shortcomings

C. your strong points                                 D. your goals

2. According to the passage, which of the following can help improve your self-esteem?

A. Setting high goals similar to others’.

B. Never forgiving yourself for your mistakes.

C. Lending a hand to a classmate in trouble.

D. Changing all the things that make you unhappy.

3. We can infer from the passage that ______.

A. the old tend to have healthier self-esteem than the young

B. we should build healthy self-esteem when young

C. there are more people with low self-esteem

D. it is not easy to build healthy self-esteem

4. The passage is mainly about ______.

A. how people improve their self-esteem                  

B. what self-esteem means

C. what people with low self-esteem are like             

D. what people with healthy self-esteem are like

5. How many ways of improving your self-esteem are mentioned in the passage?

A. Five                 B. Six                          C. Seven                      D. Eight.

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