A-A+
Why can't people on earth be harmed by radiati
问题详情
Why can"t people on earth be harmed by radiation？
A．Because men on the Earth are protected by the atmosphere.
B．Because radiation only has short-term effects on men on the Earth.
C．Because there is a great distance between the Earth and the radiation areas.
D．Because the Van Allen Belts absorb all radiation.
参考答案
正确答案：A
解析：“Neither of these forms of radiation area is dangerous to us on the earth，since we are protected by our atmosphere．”，所以生活在地球上的人类之所以不受射线的危害正：是大气层的保护。
