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Biology, 11.12.2019 18:31 FailingstudentXD
1) radiation from the earth's surface is
ultraviolet
short-wave
long-wave
x-ray
2) x-rays
have very long wavelengths
are blocked by the ionosphere
are less dangerous than ultraviolet rays
are not emitted by the sun
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Answers: 2
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You know the right answer?
1) radiation from the earth's surface is
ultraviolet
short-wave
...
ultraviolet
short-wave
...
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