题干

研究发现,人体内部存在磁场,人体内部的磁场与人体健康密切相关.

①人体内部的磁场与地磁场相比很弱,若用磁感线描述人体内部的磁场和地磁场,则下列判断中合理的是____(选填:a、b或c).

A.人体内部磁场的磁感线分布较疏

B、人体内部磁场的磁感线分布较密

C、两者磁场的磁感线疏密大致相同

②对人体内部磁场存在的原因提出猜想,请写出一种猜想及其依据.____.

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答案(点此获取答案解析)

a,电流周围有磁场,人体内也有电流

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       When you step into a new environment, you must have a strong wish to fit in. Fitting in means making more friends,having more influence on others and getting more chances to live a happier life.Here is some advice that can help you.
Be confident.Confidence attracts most people.Everyone is special and there is only one person like you in this world.Spend some time thinking about your strong points.If so, you will be able to build up confidence step by step. You won't have much difficulty fitting in.
      Be kind to everyone. Kindness is the bridge to your own happiness. When people notice your kindness,they will return it one day.Always give more than you receive,and think more of others than of yourself.A person who cares for others is popular everywhere.
     Be active in group activities.Various activities like playing football can help you to be known to others.You may add more friends to your circle.At the same time,you'll be amazed to see how much they like you. Instead of being alone to waste time,going out to dance and singing together with others to develop friendship.
       Be optimistic.Optimism makes both you and others feel pleased.It makes a good first impression. A pleasant smile costs the least and does the most.Humor catches others' attention as well.People will like you for making them live happily.
     If you follow what is mentioned above,you will be accepted by people around you.As a result,you will fit in very well and enjoy your new life.