O形橡胶密封圈的密封原理和性能是怎样的？

阅读与回答问题

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!

小题1:How do you feel when your best friend isn’t around you according to the passage?

小题2:Why do some kids feel lonely at break according to the writer?

小题3:What is the best way to make friends according to the writer?

小题4:Why do some kids need help from teachers to make friends according to the writer?

小题5:What should you do if you want to make more friends? (请自拟一句话作答)

---I visited the Purple Mountain Observatory last Sunday.

---__________ Why didn’t you tell me earlier?

A．You did?

B．I hope so.

C．Have a good time

D．It’s kind of you.

鼻头干燥色黑如烟煤状多为( )

A．阴毒冷极

B．阳毒热深

C．脾火津涸

D．阳明热证

今译：此《内经》治燥淫之旨，可赞一辞者也。至於肺气膹郁，痿喘呕欲，皆伤燥之剧病，又非制胜一法所能理也。（《秋燥论》）

满族的旗袍已有200多年的历史。( )