兴趣小组在研究扬声器结构时，发现扬声器中有一个环形磁体，他们不知道环形磁体的磁极分布情况，于是几位同学提出了以下三种猜想：

猜想1：磁极呈横向分布（例如图甲，左侧为N极，右侧为S极）；     

猜想2：磁极呈轴向分布（例如图乙，上面为N极，下面为S极）；

猜想3：磁极呈上中下分布（例如图丙，上下面为N极，中部为S极）．

根据短文内容，从选项中选出能填入空白处的最佳选项。选项中有两项多余选项。

                                                                            Five Ways to Control Your Anxiety

    How can you find some enjoyment and keep your anxiety in control? Try the following five steps for a less anxious you.

    Stop comparing yourself to others. When you compare your life to others', you are giving up your power. People have success or failures at different points in their lives. You might think others have better lives, but you don't have the full story. Next time you begin to compare yourself to someone else, tell yourself this, “I only compare me to me.” ____

    Be grateful. Gratitude is the secret to a happier, less anxious you. ____ When you practice gratitude, you start training your brain to pay attention to all the wonderful things about your life and doing so improves your mood little by little.

    Forget perfect. Going after perfection sets you up to feel defeated. Accept that you will have days that are far from perfect and learn to laugh at the funny things that go wrong at the wrong time. ____ 

    Move your body. ____ I'm sure you'll feel better--especially if you exercise regularly. Doing exercise will give you a sense of achievement that you can use to deal with other difficulties in your life.

    Connection with other people. If you struggle with anxiety, you may not feel like putting yourself into social situations, but isolating(使孤立)yourself socially is the worst thing you can do. Connecting with others can help you realize everyone has struggles and that people are there for you.

   ____ Connection can help you improve your mood.

A. Life is so much more enjoyable when you expect less of it.

B. Make sure you aren't going around trying to please everyone.

C. It is scientifically proved that exercise can improve your mood.

D. See a friend, call a family member or just smile at strangers passing by.

E. Pen and paper can provide you with a special place to express your feelings.

F. When you take time to enjoy all the good things, you can't help but feel good.

G. Only by competing with yourself to be a better you can you get where you want to be.

    Businesses are witnessing a difficult time, which has in turn produced influence on consumers, desire to go green. However, shoppers are still laying stress on environmental concerns.

    Two thirds of customers say that environmental considerations inform their purchases to the same degree as they did a year ago, while more than a quarter say that they are now even better aware of the environmental effect on what they buy.

    This may help to influence how shops store goods on their shelves. And the companies should still make efforts to become more environmentally friendly. Two out of three people think it is important to buy from environmentally responsible companies, with about one in seven saying that they had even decided to take their custom elsewhere if they felt a company's environmental reputation was not good enough.

    Harry Morrison, chief executive (主管) of the Carbon Trust, sympathizes: “I understand this situation where survival is very important now. But from environmental considerations, the clock is ticking—we don't have much time. In addition, cutting carbon has an immediate effect as costs drop and a medium-term benefit for the brand.”

    Larger companies have an extra motivation to look at reducing their carbon footprint, as new rules next year will require businesses to buy carbon allowances to make up for their emissions (排放). Those that have taken early action will have a head start. More than two thirds of consumers are not clear about which companies are environmentally responsible. This suggests that firms that are able to relay clearly their message to the public will be in a pole position to attract shoppers.

    The Carbon Trust believes that it can help by informing customers about the good work companies are doing. “When companies are granted (授予) the standard, they can use a logo (标识) in all their marketing which makes it clear that they are working towards cutting emissions,” Mr. Morrison said.

蚂蚁是我们常见的营群体生活的动物，每个群体中有蚁后、蚁王和工蚁等．蚁后的主要职能是产卵、繁殖后代；蚁王的职能是与蚁后交配，工蚁的主要职能是筑巢，觅食、饲喂幼蚁及蚁后等．请据下图及你所学知识回答下列问题：