where 定语从句 高考热点 状语从句 名词从句"where"是高考热点之一,命题中主要考查其在定语从句,名词从句和状语从句这三大从句中的使用.例如阅读与作文:英语高中版
A phosphor having the formula Na 2 (Ln 1-y-z Ce y Tb z ) 2 B 2 O 7 , wherein Ln is selected from the group consisting of La, Y, Gd, Lu, Sc and combinations thereof and wherein y=0.01-0.3 and z=0.0-0.3. The phosphor is suitable for use in a white-light emitting dev...