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A. when it is absorbed by matter B. when it is cloudy C. because they can pass through solid objects D. when the sunrays are fie
A. when it is absorbed by matter B. when it is cloudy C. because they can pass through solid objects D. when the sunrays are fie
admin
2014-05-13
91
问题
A. when it is absorbed by matter
B. when it is cloudy
C. because they can pass through solid objects
D. when the sunrays are fierce
E. when a change in the nucleus of an atom takes place
F. when electron rearrangement takes place
X-rays and gamma rays can be used to detect and treat cancer
选项
答案
C
解析
根据第三段倒数第二、三句可知,X射线和伽马射线之所以能用来探测和治疗癌症,是因为具有很多能量的X射线和伽马射线能穿透固体。
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本试题收录于:
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