问题 选择题

水是人类生活中不可缺少的物质。下列关于水的说法中正确的是 (  )

A.水是取之不尽用之不竭的

B.用肥皂水可区分硬水和软水

C.长期饮用蒸馏水对人体健康有益

D.雨水是纯净物

答案

答案:B

A、地球上谁的储量很多,但淡水资源非常短缺.故A错误;

B、肥皂水加入硬水会出现白色沉淀,所以可用肥皂水可区分硬水.故B正确;

C、长期饮用蒸馏水,人身缺少微量元素,对健康不利.故C错误;

D、雨水中含有水、氢离子、碳酸氢根离子等,属于混合物.故D错误;

故选B.

阅读理解

阅读理解。

     Most people want to be happy, but few know how to find happiness. Money and success alone do not

bring lasting happiness. Aristotle, a Greek thinker, said, "Happiness depends upon ourselves." In other words,

we make our own happiness. Here are a few suggestions to help you be happier.

     The first secret of happiness is to enjoy the simple things in life. Too often, we spend so much time

thinking about the future -for example, getting into college or getting a good job -that we fail to enjoy the

present. You should enjoy life's simple pleasures, such as reading a good book, listening to your favorite

music, or spending time with close friends. People who have several close friends often live happier and

healthier lives.

     Another secret to living a happy life is to be active, and have hobbies where you forget your problems

and time. Many people experience this dancing, or playing a sport, such as swimming. You can forget

about your problems, and only think about the activity. Finally, many people find happiness in helping others.

Studies show that people feel good when they spend their time helping others. If you want to feel happier,

do good things for someone. You can help a friend with his or her studies, go shopping to buy food for an

elderly person, or simply help out around the house by washing the dishes.

1. The best title (标题) of the passage is _____. [ ]

A. Money Makes You Happy

B. The Secrets of Happiness

C. Ideas for Helping Other People to Be Happy

D. Good Friends Make You Happy

2. The second paragraph tells us that _____. [ ]

A. the more friends you have, the happier you will be

B. we shouldn't think about our future

C. happiness is to enjoy the simple things in life

D. some people fail to live a happy life

3. The passage gives us _____ pieces of advice on happiness.[ ]

A. one

B. two

C. three

D. four

4. The writer thinks that _____.[ ]

A. everyone knows how to live a happier life

B. it's wrong to spend time on work

C. hobbies take up too much time

D. doing good things for someone can make you happier

5. Which of the following is not mentioned in the passage?[ ]

A. Reading a good book.

B. Traveling to a foreign country.

C. Playing a sport.

D. Spending time with close friends.

多项选择题