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

完形填空

阅读下面短文,请根据文后的要求进行答题。(请注意问题后的字数要求)

I like watching TV very much for I think it has many advantages. First of all, watching TV is a good rest. After a day of hard work, we need a good rest. The pleasant music and interesting TV plays can make our mind and body not tired any more. Besides, watching TV is entertaining. There are many kinds of entertainments, such as sports activities, singing and dancing concerts, plays and the activities within a short time. We need at least ten hours to fly from New York to Paris, a week by train from Beijing to Moscow and an hour to drive from Queens Distric to Manhattan Distric. _________, within just one second, TV can bring us from an NBA game in New York to a fashion show in Paris by changing the channels.

Most importantly, watching TV is educational. Our children can learn every kind of subjects through the educational programs and the special reports on TV, and it’s easy for them to learn Chinese from a Chinese teacher in Beijing and to learn Russian lessons from a Russian teacher in Moscow. Even we can learn how to behave well from the TV plays. Meanwhile, a teacher can teach millions of students without a huge classroom.

小题1:What’s the best title for the text ? (no more than 8 words)

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小题2:According to the writer, what’s the most important reason for watching TV? (no more than l2 words)

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小题3:Why can watching TV make us have a good rest? (no more than 18 words)

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小题4:What does the underlined word “ them” in the second paragraph refer to? (no more than 2 words)

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小题5:Fill in the blank in the first Paragraph (l word)

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单项选择题 A1/A2型题