试题与答案

2002年诺贝尔物理学奖中的一项,是奖励美国科学家贾科尼和日本科学家小柴晶俊发现

题型:选择题

题目:

2002年诺贝尔物理学奖中的一项,是奖励美国科学家贾科尼和日本科学家小柴晶俊发现了宇宙X射线源.X射线是一种高频电磁波,若X射线在真空中的波长为λ,以h表示普朗克常量,c表示真空的光速,以E和m分别表示X射线每个光子的能量和质量,则(  )

A.E=,m=0

B.E=,m=

C.E=,m=0

D.E=,m=

答案:

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Do you feel lonely when your best friend isn’t around? Here’s our advice to you-- and to all kids who feel lonely sometimes.

It’ s hard when a best friend isn’t around—maybe because he or she moved to a different school or a different class. You may feel left out at break or lunchtime. You want to have new friends, but how do you make them? Maybe it seems like 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:Which of the following can explain the expression “feel left out”?

A.Feel homesick.

B.Feel lonely.

C.Leave home alone.

D.Be hungry.小题2:According to the writer, some kids feel lonely at break because they    .

A.have trouble with their studies

B.don’t have their best friends around

C.need their parents to be with them

D.are too young to look after themselves小题3:The underline word “this” in Paragraph 4 means     .

A.sharing your ideas

B.talking in front of many people

C.studying better at school

D.developing new friendship小题4:Some kids need help from teachers to make friends because    .

A.they miss their old friends a lot

B.they have no time to stay with others

C.teachers know who wants a new friend

D.they are shy or not good at making friends

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