题干

某校内新华超市在开学前,计划用不多于3200元的资金购进三种学具.其进价如下:

①圆规每只10元,②三角板每付6元,③量角器每只4元;根据学校的销量情况,三种学具共需进购500只(付),其中三角板付数是圆规只数的3倍.

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    Do you feel lonely when your best friend isn't around? Of course, yes. Here's our advice to you—and to all kids who feel lonely sometimes. 
You may feel lonely at break or lunchtime when a best friend isn't around—maybe because he or she moved to a different school or a different class. You want to have new friends, but how do you make them? Maybe it seems everybody else already has his or her friends. But remember, there's always room for more friends.
    Start by looking around your classroom—think about which kids you'd like to play with at break. Look for chances to say hi to them, smile, and be friendly. Offer to share something or express your appreciation (欣赏) to them. Invite someone to play with you or say, “Do you want to sit here?” in the lunchroom. When you're at break, walk over to kids you want to play with, act friendly, and say “Hi, can I play, too?” or just join in. 
     If you have trouble doing this or if you're feeling shy, ask your teacher to help you make new friends. Teachers are usually pretty good at matching up friends. The best way to make friends is to be a friend. Be kind, be friendly, share, say nice things, offer to help ---and pretty soon, you'll have one, or two, or even more new friends.
    You might still miss that special best friend. But when you see each other, you can share something you didn't have before he or she left. You can introduce him or her to your new friends!