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．  |
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答案
答案：D
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| 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：D
| 完形填空。 | ||||
| This is Center Street. Center Street is a great place to have 1 . There are 2 shops on it. It is a very 3 street. If you want to 4 , you can go to the video arcade. It is 5 from the big supermarket. There is also a new park 6 the supermarket. It is 7 and quiet. You can 8 your lunch in it. If you want to see 9 , you can go to the movie house. It is 10 the supermarket and the park. | ||||
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