问题 选择题
在匀强磁场中有一个原来静止的碳14原子核,它放射出的粒子与反冲核的径迹是两个相内切的圆,如图所示.那么碳14的衰变方程为(  )

A.+

B.+

C.+

D.+

答案

答案:D

阅读理解

Talking to Teachers—Teachers are just people.Behind that desk, is a living, breathing human being.And just like any human being, they will probably be friendly to people who talk nicely to them.Teachers also seem to get along better with children who take schoolwork seriously and are prepared for class.And, just like any other human being, teachers like to be appreciated.The next time your teacher helps you solve a math problem or figure out a science project, say thank you with a smile.

Talking to Parents—Parents can be very supportive if their children ask for help.If you think there’s something your parents can do to help you socialize more or feel more comfortable around people, then ask them.Very often, parents want very much to help, but really don’t know what to do.Pick a quiet time of the day and ask to talk.Tell them how you feel.Maybe they had the same trouble when they were kids.

Talking to Stranger —This is always a tough one.How do you deal with a neighbor, the mail carrier, or someone walking down your street—situations that often seem to cause arguments between kids and parents.The answer to these questions will vary(变化) from kid to kid, from parent to parent because all cultures are different.Some folks live in small towns where a hello to everyone is “what’s done”.Then there are kids who live in the city who may have been taught not to speak to anyone they don’t know.If you’re having trouble with this and always feel awkward in these kinds of situations, you might want to talk to your parents or a teacher about it.Where do they think you should draw the line(线)? When is silence rude and when is it wise?

小题1:From the first paragraph we may learn that teachers dislike____ .

A.being talked to nicely

B.their students to be serious with the schoolwork

C.the students’ appreciation

D.the students who are not ready for classes小题2:If your parents are not supportive and you are not getting along quite well with your parents, who or what is to blame(该受责备)?

A.Your parents.        B Yourself.        

C.Lack of communication.   D .Your teachers.

小题3:The underlined word in the third paragraph is close in meaning to____.

A.fond

B.puzzled(困惑的)

C.frightened

D.willing小题4:The passage doesn’t say but it implies that in daily communication____.

A.arguments often happen between kids and parents

B.we should talk to the neighbors and other people according to different cultures

C.city people and country people greet in the same way

D.we should fit(使…符合) our words with proper situations

完形填空

Your vocabulary refers to the words in a language you are familiar with. Your active vocabulary contains the words you understand and use in speech and in print, and your passive vocabulary includes the words you do not use but understand. Although children learn more new words than adults, the vocabulary of an adult is not fixed and can be increased. Improve your language repertoire (全部技能) with daily exposure to new words, their pronunciations and meanings.

________. The more often you read, the faster your vocabulary can grow. Choose reading material that is slightly above your level and keep a dictionary with you to look up words you do not know.

Find a new word every day. If you do not encounter an unfamiliar word in your daily reading, use your dictionary to search for one.

Learn the correct definition and pronunciation for each new word you encounter. Pronunciation is as important as definition because in order to add a word to your active vocabulary, you must be able to use it in speech.

Explain the meaning of the word so that you can connect it to something memorable. Use imagery and personal relevance(关联). If you have just learned that the word “obstinate” means stubborn and unyielding, think about the neighbor who will not lend you his car. Imagine him shaking his head, and think of him as obstinate in his refusal.

Use your new word in speech and in writing. Tell a friend about your boss obstinately refusing to reschedule your vacation time. E-mail your sister about how your cat is obstinate about sleeping on your pillow. The first time you use a new word in speech it may seem clumsy and forced, but the more you use it, the more fluent you will become in its use. Soon it will be a regular part of your active vocabulary.

Tell everyone you are trying to increase your vocabulary. Encourage them to ask you what your latest word is, or to ask for the definition of a new word you have used. The more you explain the meaning of a word to someone, the more likely you are to remember it.

小题1:What is the passage mainly about? (no more than 6 words)

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小题2:What should we do if there is no unfamiliar word in our daily reading? (no more than 7 words)

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小题3:What’s the purpose of the example of the word “obstinate”( no more than 15 words)

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小题4:Fill in the blank in paragraph 2 with proper words. (no more than 4 words)

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小题5:What does the underlined word “it” in paragraph 4 probably refer to ? (no more than 3 words )

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