if the distance between a point soutce of light and a surface is tripled,the intensity ifif the distance between a point soutce of light and a surface is tripled,the intensity of illumination on the surface will bea,tripledb,doubledc,reduce to1/2d,re

the furthest distance in the world is not betw This distance is negative if the plane is to be behind the viewer.//求翻译 in the distance和from the distance If there is love is also a pain in the distance是什么意思 Even if the time and distance is a wall ,You are also my at a distance,in the distance,of a distance 区别 in the distance和 at distance区别 The furthest distance From the Distance 歌词 Over The Distance 歌词 in the distance walk the distance 英语翻译If you can fill the forgiving minute with the sixty seconds' worth of distance run -----Yours is the Earth. 英语翻译If you can fill the forgiving minute with the sixty seconds' worth of distance run -----Yours is the Earth. I just want to improve that distance can not change the friendship .If you need the example.This is 英语几何题!If the foci of an ellipse are two points of the trisection of the major axis,then the ratio of the distance between the directrix to the distance between the foci is____? The train______in the distance.(appear) The feeling has the distance