the number of throies of the solar system ............., each galaxy has distinctive shape according to ...........................and........... , explosion of some star suddenly , draw the image when the object less than F in concave mirror , the origin of solar system ........... according to la place , if the eye lens is a concave lens what happen , the object is put in 5 cm from a plane mirror if the object move 2 cm what is the distance between the first object and the second image , the number of galaxies ........... and the temperature within minutes equal ........., uses of lens , draw the concave lens.

2

由
列印
嵌入

排行榜

視覺風格

選項

切換範本

)
恢復自動保存: ?