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Cosmic rays of various kinds come through the air from outer space, but enormous quantities of radiation from the sun are______o
Cosmic rays of various kinds come through the air from outer space, but enormous quantities of radiation from the sun are______o
admin
2005-11-28
99
问题
Cosmic rays of various kinds come through the air from outer space, but enormous quantities of radiation from the sun are______off.
选项
A、avoided
B、excluded
C、screened
D、separated
答案
C
解析
本题意为“宇宙中的各种光线从外层空间通过大气层传来,但是太阳的大量辐射能被大气层隔开。”screen off的意思是“隔开”;avoid的意思是“避免”;exclude的意思是“排除”:separate的意思是“使隔开”,其后不跟off。根据题意,只有C项为正确答案。
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考博英语
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