A-A+
A．Because men on the Earth are protected by th
问题详情
A．Because men on the Earth are protected by the atmosphere.
B．Because radiation only have short-term effects on men on the Earth.
C．Because the Earth is quite far from the radiation areas.
D．Because the Van Allen Belts absorb all radiation.请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：A
解析：Why can't people on earth be harmed by radiation?
四个选项都是以because开头，由此可以推测，本问题的考查内容是某件事情的原因。
文中提到Neither of these forms of radiation are danger to us... since we are protected by our atmosphere... Once outside the atmosphere...can be harmful in a number of ways. 地球上的人没有受到辐射伤害是因为有大气层的保护，一旦出了大气层，就会受到辐射的威胁。故正确答案为A)。
