问题 选择题

一长直铁芯上绕有一固定线圈M,铁芯右端与一木质圆柱密接,木质圆柱上套有一闭合金属环N,N可在木质圆柱上无摩擦移动。M连接在如图所示的电路中,其中R为滑线变阻器,E1和E2为直流电源,S为单刀双掷开关。下列情况中,可观测到N向左运动的是

[ ]

A.在S断开的情况下,S向a闭合的瞬间

B.在S断开的情况下,S向b闭合的瞬间

C.在S已向a闭合的情况下,将R的滑动头向c端移动时

D.在S已向a闭合的情况下,将R的滑动头向d端移动时

答案

答案:C

选择题
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 (取决于)ourselves." In other words, we make our own happiness. Here are a few suggestions(建议) 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.

小题1:The best title 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小题2:The passage gives us ______pieces of advice on happiness.

A.one

B.two

C.three

D.four小题3: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小题4:Which of the following is not mentioned(提及)in the passage?

A.Reading a good book.

B.Traveling to a foreign country.

C.Playing a sport.

D.Spending time with close friends.