At ground level, ozone iss a harmful pollutant, but (in the stratosphere) it shields the Earth from the most biologically harmful radiation emitted by the Sun. radiation in the ultraviolet band of the spectrum.----括号内为划线部分,不知道题目是不是错了,句号的位置怪怪的
A. the same B. in the stratosphere, in which C. it is in the stratosphere, which D. in the stratosphere where E. it is in the stratosphere and
答案是A,有谁能解释下为什么不是D? 还有where 和 in which 的区别在哪里?什么句子里用where 什么地方用in which?